ASUS X99-A
3.9Editor score
ATX Intel X99 platform
LGA 2011-v3 processor support
PCIe 3.0 M.2 connectivity
Crystal Sound 2 audio
In this guide
An LGA 2011-3 X99 motherboard can provide access to affordable Intel Xeon E5 V3 and V4 processors, dual-CPU workstation platforms, and high-capacity DDR4 systems. However, the socket designation alone does not reveal expansion options, memory behavior, power delivery, or case compatibility. A well-chosen board balances those features with the processor and workload you intend to use.
This guide compares ten LGA 2011-3 X99 motherboards across the details that materially affect a build: supported processors, DDR4 capacity and channels, PCIe and M.2 connectivity, SATA ports, networking, audio, form factor, cooling provisions, and included accessories. It also distinguishes established ASUS models from newer boards and dual-socket alternatives whose installation requirements are considerably more involved.
Each review explains the strongest reasons to consider the board, along with practical compatibility warnings drawn from the supplied specifications. The top picks represent the strongest overall, budget, and premium options, while the remaining entries show the most relevant alternatives for specific systems. Product availability and prices can change, so confirm current listing details before purchasing.
Top 3 Picks for the Best Lga 3 X99 Motherboard
ASUS X99-E WS/USB 3.1
4.1Editor score
Four-way PCIe graphics support
Dual 10Gb/s USB 3.1
Onboard PCIe 3.0 M.2
Maintenance diagnostic tools
MACHINIST X99 V9S
3.7Editor score
Four-channel DDR4 architecture
Three PCIe 3.0 M.2 slots
Intel C612 chipset
Xeon E5 and Core i7 support
Top 10 Best Lga 3 X99 Motherboard in 2026 Compared
The comparison below places all ten boards on the same practical checklist, covering their stated processor platforms, memory layouts, expansion capabilities, form factors, storage, networking, and notable design features.
ProductsSpecificationsEditor scorePrice
Best Budget
MACHINIST X99 V9S
LGA 2011-3 socket
Four-channel DDR4
Three NVMe M.2 slots
Micro-ATX form factor
3.7Editor score
Editor's Choice
X99 PR9-H White
LGA 2011-3 socket
Dual-channel DDR4
One PCIe M.2 slot
Micro-ATX form factor
3.9Editor score
Editor's Choice
ASUS X99-E WS/USB 3.1
LGA 2011-3 platform
Quad graphics link support
Dual USB 3.1
EATX form factor
4.1Editor score
ASUS X99-A
LGA 2011-v3 socket
Intel X99 chipset
PCIe 3.0 M.2
ATX form factor
3.9Editor score
X99 Dual-CPU 490710
Dual LGA 2011-3 sockets
Eight DDR4 DIMM slots
Two PCIe x16 slots
Six SATA 3.0 ports
Tangxi X99 Gaming
LGA 2011-3 socket
Four-channel DDR4
NVMe and NGFF M.2
Micro-ATX form factor
2.9Editor score
X99 Dual-CPU
Dual LGA 2011-3 sockets
Eight DDR4 DIMM slots
Two PCIe x16 slots
Six SATA 3.0 ports
2.4Editor score
Dual M.2 X99
LGA 2011-3 platform
Dual NVMe M.2 slots
DDR3 and DDR4 support
Passive chipset cooling
X99 M-ATX E5
LGA 2011-3 socket
E5 V3 and V4 support
NVMe M.2 connectivity
Micro-ATX form factor
E5 MR9A V1.0
LGA 2011-3 socket
Xeon E5 V3 V4
DDR4 memory support
ATX form factor
1. MACHINIST X99 V9S – Best Premium Expansion
MACHINIST X99 V9S
Intel C612 chipset
Four-channel DDR4
Three NVMe M.2 slots
Six-phase power design
The MACHINIST X99 V9S is a feature-dense micro-ATX board built around Intel's C612 chipset and the LGA 2011-3 platform. It carries a 3.7 rating, but its defining attraction is the unusually broad storage provision: three NVMe M.2 slots operating at PCIe 3.0 x4 bandwidth. That makes it a compelling foundation for a system expected to hold several fast solid-state drives without relying entirely on SATA storage.
Pros
- Three high-speed M.2 slots
- Broad Xeon processor support
- Four-channel memory layout
- Dedicated VRM cooling fan
Cons
- User manual and battery excluded
- Mixed memory rules require care
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Processor support extends across Intel Xeon E5 V3 and V4 families and specified Core i7 5th- and 6th-generation models. The four DDR4 DIMM slots can accommodate up to 128GB and support ECC, RECC, and non-ECC memory, while the listing specifically warns that server and desktop memory should not be combined and that Core i7 processors are not compatible with desktop RAM. For storage-heavy workstations, this combination of processor breadth, four memory channels, and three M.2 positions is particularly appealing.
The board also includes a PCIe 3.0 x16 slot, a PCIe 3.0 x4 slot, Gigabit Ethernet, SATA 3.0, USB 3.0, a WiFi M.2 interface, and a dedicated TPM M.2 header. Its Intel C612 chipset and six-phase power design with VRM cooling are intended to support stable communication and heat dissipation. The main compromises are practical rather than architectural: the manual and CR2032 battery are not included, and the TPM header supports only an ASUS TPM module.
This is the premium choice in the roundup for users who prioritize storage expansion and flexible Xeon-based configurations. It is less convenient for a first-time builder because memory compatibility must be checked carefully and a few small components must be sourced separately. Buyers who need three NVMe drives, four memory channels, and a compact board should give it particular consideration.
Storage Headroom for Workstations
Three PCIe 3.0 x4 M.2 positions allow a much more storage-dense configuration than most competing boards in this guide. That is useful for project files, virtual machines, large libraries, and systems that prefer high-speed NVMe media over additional SATA drives.
Memory Configuration Needs Care
The board supports ECC, RECC, and non-ECC DDR4, but its instructions prohibit mixing server and desktop memory. Check the processor and module type together before purchasing, and populate the intended channel arrangement according to the manual.
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2. X99 PR9-H White – Compact Practical Option
X99 PR9-H White
Six-layer micro-ATX PCB
Dual-channel DDR4
PCIe 3.0 M.2 slot
24-pin plus eight-pin power
The X99 PR9-H White is a compact micro-ATX X99 board rated at 3.9, giving it one of the stronger customer ratings in the group. It supports a broad selection of LGA 2011-3 processors, including listed Core i7 models and Xeon E5 V3 and V4 families. Its practical appeal comes from combining that processor flexibility with a smaller board size and a useful set of basic connectivity options.
Pros
- Wide LGA 2011-3 CPU support
- Compact micro-ATX layout
- Preassembled rear I/O shield
- Realtek gigabit networking
Cons
- Only one M.2 connector
- No battery included
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Four DDR4 slots provide dual-channel operation and support for ECC, RECC, and non-ECC memory up to 128GB. Storage is handled through one PCIe 3.0 x4 NVMe M.2 slot and SATA 2.0 connections, while external options include USB 2.0, PS/2, Gigabit Ethernet, and Realtek ALC897 2.1-channel audio. A six-layer PCB, full solid capacitors, and a 24+8-pin power connector form the stated foundation for stable power delivery.
Some compromises are obvious. There is only one M.2 slot, so a system requiring multiple NVMe drives would need another storage solution. The manual is not included, although the seller offers to provide the file through Amazon, and buyers must purchase a CR2032 battery separately. The included I/O shield, CPU cooler bracket, and SATA cable do simplify the initial assembly.
The PR9-H White suits builders seeking a compact general-purpose X99 system without paying for a dual-CPU platform or requiring many high-speed storage devices. It is a sensible option for an office workstation, home server, or gaming build using a compatible processor. Confirm that your case accepts micro-ATX boards and verify the desired memory type before ordering.
Compact Footprint for Flexible Builds
The micro-ATX format can make system planning easier for builders who want X99 capability without a full-size board. It still requires a case with compatible mounting support and adequate clearance for the installed processor cooler and graphics card.
Straightforward Core Connectivity
Gigabit Ethernet, legacy USB 2.0 and PS/2, SATA storage, and basic onboard audio cover many conventional desktop needs. The NVMe M.2 slot adds a faster modern storage path, although its single-connector limit should influence planning.
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3. ASUS X99-E WS/USB 3.1 – Best Overall Workstation Choice
ASUS X99-E WS/USB 3.1
Four-way PCIe x16 link
Two 10Gb/s USB 3.1
Onboard PCIe 3.0 M.2
EATX board layout
The ASUS X99-E WS/USB 3.1 is the strongest overall pick in this guide and has the highest listed rating among the ten products at 4.1. It is designed as a high-end EATX X99 platform rather than a basic entry board. Its most significant feature is a four-way PCI Express 3.0 x16 link, providing extensive graphics-card expansion for NVIDIA SLI and AMD CrossFireX configurations.
Pros
- Highest listed customer rating
- Extensible multi-GPU graphics
- High-speed USB 3.1 connectivity
- Built-in maintenance features
Cons
- EATX limits case options
- Multi-GPU use needs planning
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Storage and peripheral connectivity are also strong. The board includes an onboard M.2 x4 slot and support for ASUS PIKE II and Thunderbolt II expansion cards. Two USB 3.1 ports provide 10Gb/s transfer rates, while the stated premium component design and five-way optimization system focus on power efficiency, overclocking, and cooling. ASUS Q Code Logger, the maintenance button, and Dr. Power LED add practical diagnostic tools for a workstation that may operate unattended.
The main trade-off is physical scale. EATX is larger than ATX and Micro-ATX, so a builder needs a suitably spacious case and should verify mounting and airflow. The four-way graphics capability is valuable only when the processor, graphics cards, power supply, case, and intended workload all support that arrangement. This is not a configuration every system needs, and unnecessary multi-card installations can complicate cooling and power delivery.
For a serious X99 workstation where expandability, fast external storage connections, diagnostics, and multi-graphics support matter, the X99-E WS/USB 3.1 is the most convincing all-around option here. It is also the editor's choice because its feature set is unusually coherent for the platform, while its 4.1 rating is the strongest customer feedback listed.
A Strong Foundation for Complex Workloads
The board's premium components, broad graphics support, and M.2 storage position it well for workstations that handle demanding applications. Its maintenance and diagnostic features add value when troubleshooting is less convenient or immediate access is limited.
High-Speed Peripheral Expansion
Dual 10Gb/s USB 3.1 connectivity is useful for fast external storage, and the stated support for PIKE II and Thunderbolt II cards creates additional routes for specialized expansion. Availability and support for any add-in card should be confirmed before finalizing a build.
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4. ASUS X99-A – Best Budget ATX Board
ASUS X99-A
Intel X99 Express chipset
LGA 2011-v3 processor support
PCIe 3.0 M.2 slot
ATX board format
The ASUS X99-A is a budget-focused ATX motherboard for users who want a recognizable X99 platform without paying for the more elaborate workstation features of the X99-E WS. It supports Intel Core i7 processors on the LGA 2011-v3 socket and uses the Intel X99 Express chipset. Its 3.9 rating indicates comparatively positive customer feedback within this roundup.
Pros
- Recognizable ASUS platform
- DDR4 3000 support
- Five-way optimization tools
- Integrated gigabit Ethernet
Cons
- No multi-GPU feature stated
- Older storage interface mix
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The board's stated highlights include ASUS OC Socket technology for compatible eight-core processors and DDR4 performance, five-way optimization with automatic overclocking and cooling functions, and a PCI Express 3.0 x4 M.2 interface. SATA Express support adds another storage option, while Crystal Sound 2 and Intel Gigabit Ethernet cover everyday audio and networking requirements.
Its straightforward ATX layout is easier to accommodate than EATX, and the feature set is focused rather than overloaded with specialist workstation connectors. On the other hand, the supplied information does not advertise the same multi-graphics arrangement or dual high-speed USB 3.1 provisions as the X99-E WS. The M.2 and SATA Express combination is useful but less expansive than the three-M.2 configuration offered by the MACHINIST X99 V9S.
For a conventional gaming, productivity, or enthusiast desktop built around a compatible Core i7 processor, the X99-A is a sound budget-oriented choice. It offers the core benefits of an X99 platform—DDR4, PCIe 3.0, M.2 storage, and established chipset support—without requiring the physical size or specialized expansion of a premium workstation board.
Familiar ASUS Software Features
Five-way optimization is designed to simplify processor, memory, fan, and power behavior with a guided setup. The OC Socket feature may also appeal to users comfortable tuning a compatible eight-core CPU and its memory configuration.
Balanced Everyday Storage Support
The PCIe 3.0 x4 M.2 slot supports a modern NVMe drive, and SATA Express adds flexibility for compatible storage. It remains more modest than the multi-M.2 alternative, but it covers the needs of a typical single-workstation or gaming system.
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5. X99 Dual-CPU 490710 – Best for Two-Processor Platforms
X99 Dual-CPU 490710
Two LGA 2011-3 sockets
Eight DDR4 DIMM slots
Two PCIe x16 slots
Six SATA 3.0 ports
The X99 Dual-CPU 490710 is designed around a very different proposition from the single-socket alternatives: it supports two LGA 2011-3 processors. This makes it relevant to specialized workstation or server-style builds that benefit from distributing memory, storage, and workload capacity across two CPU platforms rather than concentrating everything on a single processor.
Pros
- Dual processor capability
- Eight memory module slots
- Six SATA 3.0 connectors
- Integrated gigabit networking
Cons
- No customer rating listed
- Dual-CPU demands more power
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Its eight DDR4 DIMM slots support modules listed at 3000, 2666, 2400, and 2133MHz. The board also provides two PCIe x16 slots, two PCIe x1 slots, a Realtek RTL8111H gigabit network controller, integrated six-channel audio, USB 3.0 and USB 2.0 headers, and six SATA 3.0 interfaces. Those storage and expansion counts provide a substantial foundation for a multi-drive workstation.
The challenge is that the listing provides fewer descriptive details than the better-documented products. It does not provide a customer rating, a detailed processor support list, exact M.2 support, or comprehensive accessory information. A two-socket system also demands careful coordination of processor compatibility, memory population, operating system support, power supply capacity, case dimensions, and cooling. None of those issues should be treated as optional details in a dual-processor installation.
The 490710 is best suited to an informed builder seeking two Xeon E5 processors and the memory bandwidth or workload capacity that can come from a dual-CPU platform. It is less appropriate for a conventional gaming system or a first LGA 2011-3 build, where the additional complexity offers little practical benefit.
When Two Processors Make Sense
A dual-socket design can make sense in specialized workstations and server-derived systems where more memory capacity, processor threads, or I/O resources are genuinely useful. The cost is a more involved build with greater power, cooling, and compatibility demands.
Extensive Memory and Storage Sockets
Eight DDR4 slots and six SATA 3.0 ports make the board attractive for systems with substantial local storage. A complete build should document which modules work together and how the operating system will recognize the intended dual-processor configuration.
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6. Tangxi X99 Gaming – Flexible Four-Channel Gaming Board
Tangxi X99 Gaming
Four-channel DDR4 design
NVMe and NGFF M.2
Eight-layer PCB construction
Six-phase power delivery
The Tangxi X99 Gaming is a micro-ATX board aimed at both compatible Core i7 systems and Xeon E5 V3 and V4 platforms. Its stated CPU list covers numerous LGA 2011-3 models, including i7-6950X, i7-6900K, i7-6850K, i7-6800K, i7-5960X, i7-5930K, and i7-5820K, along with several E5 processors. That breadth is useful when the desired X99 processor may differ from a mainstream desktop model.
Pros
- Broad processor model support
- Four-channel memory design
- M.2 plus SATA 3.0 storage
- Compact micro-ATX format
Cons
- Lowest listed rating
- Basic external USB selection
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Four 240-pin DDR4 desktop memory slots support a four-channel configuration and up to 128GB. The listed frequencies include 3200, 2666, 2400, and 2133MHz, although real-world memory stability depends on the processor, module organization, and board settings. For storage, the M.2 interface accepts NVMe and NGFF drives, while SATA 3.0 provides 6Gb/s channels for conventional drives.
The board uses an eight-layer PCB, full solid capacitors, and a six-phase power design, with a 24+8-pin connector for CPU power. Its external I/O includes four USB 2.0 ports, two USB 3.0 ports, gigabit Ethernet, and a 3-in-1 audio jack. These are functional rather than premium connections, and the board's 2.9 rating is the lowest listed in the guide, so prospective buyers should examine current customer feedback carefully.
Despite that weakness, the Tangxi is a relevant choice for a compact four-channel gaming or productivity system with a compatible LGA 2011-3 processor. Its appeal lies in the combination of four memory channels, 128GB maximum capacity, M.2 support, and broad processor coverage. It is not the strongest recommendation for a quiet, polished build or a buyer who prioritizes refined connectivity and diagnostic features.
Four Channels in a Compact Board
The four-channel layout can provide useful memory bandwidth for compatible processors and properly matched modules. A compact micro-ATX design can also reduce the space required for the main platform while retaining several modern storage and expansion options.
Modern Storage With Legacy Connections
The M.2 slot supports both NVMe and NGFF formats, giving users more choice than a board limited to one protocol. SATA 3.0 remains useful for optical drives and secondary storage, while the external USB selection is more conventional.
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7. X99 Dual-CPU – High-Capacity Xeon Alternative
X99 Dual-CPU
Two processor sockets
Eight DDR4 DIMM slots
Two PCIe x16 connectors
Six SATA 3.0 ports
The X99 Dual-CPU board is another high-capacity platform for LGA 2011-3 Xeon E5 systems, sharing the same broad configuration style as the 490710. It supports two processors, eight DDR4 DIMM slots, two PCIe x16 slots, and two PCIe x1 connectors. The memory specification lists 3000, 2666, 2400, and 2133MHz support, making it a natural candidate for a high-capacity Xeon workstation.
Pros
- Two Xeon processor support
- Eight memory slots
- Multiple graphics expansion slots
- Six SATA 3.0 interfaces
Cons
- Lowest customer rating
- Limited published specification detail
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Integrated features include Realtek RTL8111H gigabit networking, a six-channel audio controller, USB 3.0 and USB 2.0 headers, and six SATA 3.0 interfaces. Those specifications are strong for a locally stored, multi-drive workstation. They do not, however, establish compatibility with every Xeon E5 processor or operating system arrangement, so the board should be treated as a specialist purchase rather than a simple drop-in component.
Its 2.4 rating is the lowest in the roundup. Combined with the sparse descriptive information, that makes careful review of current customer feedback essential. There is no listed numerical rating for a particular processor model, M.2 standard, form factor, power connector arrangement, or included accessory. A buyer can still identify the intended platform from the dual sockets, eight DIMMs, and six SATA connectors, but should verify every other requirement from the current listing and manufacturer documentation before committing.
This board is most appropriate for a builder who specifically needs dual Xeon capability and has the technical confidence to assemble and configure the platform. It is not a strong general recommendation for gaming, compact systems, or first-time builders. The potential memory capacity and storage connectivity justify consideration, but its low rating and limited published detail make verification especially important.
Designed for High-Capacity Configurations
Eight memory slots and support for two processors create a platform with considerable theoretical capacity. That capacity is only useful when supported processors, compatible memory, and suitable operating systems are paired correctly.
Storage-Focused Expansion
Six SATA 3.0 ports provide a useful base for hard drives and secondary storage. Two full-length PCIe slots also leave room for graphics or accelerator cards, subject to case clearance and power-supply limits.
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8. Dual M.2 X99 – Flexible Memory and Storage Design
Dual M.2 X99
Dual NVMe M.2 slots
DDR3 and DDR4 support
LGA 2011-3 platform
Passive chipset heatsinks
The Dual M.2 X99 distinguishes itself with two NVMe M.2 slots and support for both DDR3 and DDR4 memory on the LGA 2011-3 platform. That combination can simplify reuse of components from an earlier system while still allowing a modern high-speed storage configuration. The board's description emphasizes faster data transfer, improved response latency, and smoother multitasking when several demanding applications are active.
Pros
- Two high-speed NVMe slots
- DDR3 and DDR4 flexibility
- Aluminum chipset heatsinks
- Signal-integrity memory layout
Cons
- No customer rating listed
- Detailed compatibility data is limited
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Its memory layout reportedly uses careful trace and via routing, ground-layer optimization, and a premium power design intended to support more cores and improve memory overclocking potential. Cooling includes a passive chipset heatsink and aluminum heatsinks. These are useful design themes, but they do not replace a documented processor list, explicit memory speeds, expansion-slot count, or form-factor dimensions.
The lack of a customer rating makes the board harder to evaluate than the better-reviewed products. A prospective buyer should verify exactly how DDR3 and DDR4 support is implemented, whether both types can be installed simultaneously, and which slot population is valid. It is also important to confirm the number and arrangement of SATA connectors, rear I/O, and internal headers, none of which are fully described in the supplied information.
The board's strongest argument is flexibility: two NVMe positions and support for two generations of DDR memory. It may suit a builder reusing a suitable memory kit or planning a storage-dense LGA 2011-3 system. Because the listing remains general, treat this as a compatibility-first purchase and verify the current manual, BIOS support, and physical specifications before buying other components.
Two Paths for High-Speed Storage
Two NVMe M.2 slots can reduce reliance on SATA drives and keep active applications on fast solid-state media. Confirm the physical connector type, supported protocols, and boot behavior in the current documentation.
Memory Reuse Requires Verification
DDR3 and DDR4 support can be valuable when rebuilding an older platform, but modules of different types generally should not be assumed to work together. Verify the supported population rules and whether the board accepts both types simultaneously.
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9. X99 M-ATX E5 – Compact Xeon Storage Platform
X99 M-ATX E5
LGA 2011-3 socket
Xeon E5 V3 V4 support
DDR4 memory support
Sixteen SATA connectors
The X99 M-ATX E5 is a compact motherboard defined by support for LGA 2011-3 Xeon E5 V3 and V4 processors, DDR4 memory, and NVMe M.2 storage. Its title also identifies PCIe 3.0 and 16 SATA connectors, suggesting a platform oriented toward systems that need more conventional storage connections than a typical compact desktop provides.
Pros
- Explicit Xeon E5 V3 V4 support
- NVMe M.2 connectivity
- Sixteen SATA connectors
- Compact micro-ATX layout
Cons
- No customer rating listed
- Very limited descriptive information
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For a home server, compact workstation, or archive-oriented build, the combination of a micro-ATX footprint, Xeon processor support, and sixteen SATA connections is potentially useful. NVMe M.2 allows fast system or application storage, while the numerous SATA ports can support a large collection of hard drives, SSDs, or optical devices. The exact supported memory capacity, speed, slot count, and power arrangement are not detailed in the supplied listing information.
Because no customer rating is provided, the board's real-world reception cannot be judged from the available feedback. A careful buyer should also determine the precise SATA version, whether the sixteen connectors are all physically available, what expansion slots are present, and whether any M.2 connector shares bandwidth with other devices. These are important considerations for a drive-heavy system where a single shared lane could affect performance.
The board is best considered for a clearly defined high-drive-count build in a compact chassis. It is less suitable for buyers who want a polished general-purpose desktop or who expect comprehensive compatibility details from the product description. Confirm the CPU list, BIOS support, memory limits, and case fit before assembling the rest of the system.
Useful for Storage-Heavy Compact Systems
Sixteen SATA connections can reduce the need for additional expansion cards in a compact enclosure. Actual drive support remains subject to power delivery, operating-system limitations, and any shared lanes, all of which should be checked.
Xeon and Fast Storage Foundation
Explicit support for Xeon E5 V3 and V4 processors makes the board a natural candidate for cost-conscious workstation builds. Pairing that processor support with NVMe M.2 creates a useful split between fast active storage and high-capacity conventional drives.
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10. E5 MR9A V1.0 – Straightforward ATX Xeon Board
E5 MR9A V1.0
LGA 2011-3 socket
Xeon E5 V3 V4 support
DDR4 memory support
ATX form factor
The E5 MR9A V1.0 is an ATX X99 motherboard aimed at Intel Xeon E5 V3 and V4 processors on the LGA 2011-3 socket. It supports DDR4 memory and includes NVMe M.2 storage plus USB 3.0, covering the core elements required for a contemporary build on this older server-derived platform.
Pros
- Clear Xeon E5 processor target
- M.2 high-speed storage support
- USB 3.0 external connectivity
- ATX case compatibility
Cons
- No customer rating listed
- Published specifications are limited
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The stated design emphasizes a solid power supply and cooling, lower temperatures under full load, high-frequency memory support, and smooth multitasking. It also advertises an M.2 interface for high-speed SSD expansion, complete external interfaces, and multiple safety protections. These points suggest a general-purpose platform intended for building, office, and gaming systems rather than a narrowly specialized dual-CPU design.
Detailed information is limited, however, and no customer rating is supplied. The listing does not state the number of memory slots, maximum memory capacity, exact memory frequencies, expansion-slot arrangement, SATA connector count, audio controller, networking hardware, or included accessories. Those omissions matter when choosing a board for a complete system, particularly if the plan depends on multiple drives, a particular case, or a specific network adapter.
The MR9A is most appropriate for a buyer who understands the basics of LGA 2011-3 builds and can verify the remaining specifications in the current listing. Its straightforward ATX format, Xeon support, DDR4, and M.2 make it a plausible general-system option. It is not as compelling as the better-documented ASUS boards or the MACHINIST model for buyers who need precise expansion information before purchasing.
A Practical Core Platform
LGA 2011-3 Xeon support, DDR4, and NVMe M.2 provide a useful foundation for a modern build on an older platform. The remaining components can be selected around a final list of ports, slots, and memory requirements.
Power and Cooling Focus
The listing specifically emphasizes the power system, cooling, and full-load stability. A processor with substantial power requirements still deserves a capable cooler and a power supply with appropriate headroom for the complete configuration.
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Buying Guide – How to Choose the Best Lga 3 X99 Motherboard
The right X99 board depends less on the chipset name and more on the processor, memory arrangement, case, expansion needs, and storage plan. Review the following factors before making a purchase, especially when comparing newer boards with established ASUS platforms.
Processor and Socket Compatibility
Every board in this roundup uses the LGA 2011-3 or LGA 2011-v3 platform, but socket compatibility does not guarantee that every CPU will work as intended. The MACHINIST, X99 PR9-H White, Tangxi, and E5 MR9A listings explicitly reference Xeon E5 V3 or V4 families and selected Core i7 models, while the ASUS X99-A is identified for Intel Core i7 processors on LGA 2011-v3. Confirm the exact CPU model in the current support list, including any limitations applied to V4 processors.
Single-CPU or Dual-CPU Architecture
Most X99 boards in this guide accept one processor, but the 490710 and another dual-CPU listing provide two LGA 2011-3 sockets. A dual-CPU platform can increase potential memory and thread capacity, but it also requires two supported processors, a compatible operating system, more power delivery, larger cases, and more involved cooling and troubleshooting. Single-socket designs are simpler and usually more appropriate for gaming, ordinary desktops, and small home servers.
Memory Channels, Type, and Capacity
X99 memory behavior is one of the most important differentiators. The MACHINIST and Tangxi boards describe four-channel configurations, while the PR9-H White lists dual-channel operation. Memory types can also differ: the MACHINIST supports ECC, RECC, and non-ECC DDR4 but warns against combining server and desktop memory, and the PR9-H also lists all three. The two dual-CPU boards provide eight DIMM slots, creating substantial potential capacity.
NVMe, NGFF, and SATA Storage
Storage needs vary more on X99 systems because builders may combine new SSDs with older data drives. The MACHINIST offers three PCIe 3.0 x4 NVMe positions, the Tangxi supports both NVMe and NGFF in its M.2 slot, and the ASUS X99-A combines a PCIe 3.0 x4 M.2 interface with SATA Express. Other boards advertise fewer modern connectors or focus on SATA. The listed X99 M-ATX E5 board offers 16 SATA connectors, making it attractive for high-drive-count systems.
Graphics and PCIe Expansion
The ASUS X99-E WS stands apart with a four-way PCI Express 3.0 x16 link supporting NVIDIA SLI and AMD CrossFireX. The dual-CPU alternatives each list two PCIe x16 and two PCIe x1 slots, while the MACHINIST lists one PCIe 3.0 x16 and one PCIe 3.0 x4 slot. Expansion requirements should be tied to the workload: a single modern graphics card is usually sufficient, whereas multi-GPU or accelerator configurations require coordinated power, cooling, and software support.
Form Factor and Case Fit
The roundup spans micro-ATX, ATX, and EATX. Micro-ATX boards such as the MACHINIST, PR9-H White, Tangxi, and X99 M-ATX E5 can suit smaller cases, while the ASUS X99-A offers a conventional ATX footprint. The X99-E WS is EATX and needs a larger enclosure with appropriate mounting support. Always account for processor-cooler height, graphics-card length, and airflow, even when the board itself fits.
Power Delivery and Cooling
X99 platforms range from six-phase designs to ASUS premium component arrangements. The MACHINIST, Tangxi, and PR9-H White describe solid capacitors, multi-layer PCBs, and enhanced power or heat-dissipation features. The E5 MR9A emphasizes stable power and cooling under load. These claims still need to be considered alongside the processor's demands, case airflow, and the quality of the selected power supply.
Networking, Audio, and Diagnostics
Most boards provide gigabit Ethernet, but the ASUS X99-E WS adds higher-speed USB 3.1 and maintenance-oriented features such as Q Code Logger, an easy-maintenance button, and Dr. Power LED. The PR9-H uses Realtek 8111H networking and ALC897 audio, while the Tangxi has a basic 3-in-1 audio connection. Diagnostic tools and port selection can matter greatly in a workstation that must be serviced without a display attached.
How to Use and Care for Your Lga 3 X99 Motherboard
Before installation, read the motherboard manual, verify the processor model, and confirm that the chosen DDR4 modules are appropriate for that CPU and the board's channel rules. Install the processor, cooler, and memory according to the manual's sequence. Pay particular attention to the CPU socket, cooler retention hardware, DIMM positions, and the location of the CPU and motherboard power connectors.
When connecting storage, use the specified SATA data cables and confirm that M.2 drives are seated and secured. Do not force a connector or mix incompatible memory types. After the first boot, save the CMOS setup, install the appropriate chipset, network, and storage drivers, and update the firmware only after confirming the current BIOS version and following the board's documented procedure.
Maintain the system by keeping dust away from heatsinks, checking airflow around the VRM and chipset, and using a surge protector or other appropriate power protection. For unusual behavior, the MACHINIST listing recommends checking power connections, memory seating, and processor or memory compatibility before clearing CMOS. If the board does not boot or display correctly, document the symptoms and check the current manufacturer's troubleshooting guidance.
Frequently Asked Questions
What is an LGA 2011-3 X99 motherboard?
An LGA 2011-3 X99 motherboard uses Intel's X99 chipset family and a socket that accommodates selected Xeon E5 V3, Xeon E5 V4, and compatible Core i7 processors. These boards are normally paired with DDR4 memory and PCIe 3.0 expansion. CPU support varies by model, so the exact processor list for the chosen board must be checked before assembly.
Can I use a Core i7 processor in every X99 board listed here?
No. Although many boards mention compatible Core i7 processors, some listings focus more heavily on Xeon E5 support, and memory rules can differ. The MACHINIST X99 V9S specifically states that Core i7 processors are not compatible with desktop RAM. Confirm both CPU and memory support together rather than assuming socket fit guarantees full functionality.
Should I choose a four-channel or dual-channel X99 board?
A four-channel design can offer more memory bandwidth when the processor and modules support the intended configuration. A dual-channel board may be sufficient for a general-purpose system and can still accept substantial memory. The processor's memory controller, installed module layout, workload, and any mixing restrictions are more important than the channel label alone.
Are dual-CPU X99 boards suitable for gaming?
They can run games, but they are generally inefficient and complicated for that purpose. A dual-socket platform may demand two processors, a large case, extensive cooling, and a high-capacity power supply. Single-socket X99 boards usually provide a more practical gaming foundation, while dual-CPU models make more sense for specialized workstation or server-style needs.
Do all these motherboards include M.2 storage support?
Most models in the roundup explicitly advertise M.2 connectivity, including the ASUS X99-E WS, ASUS X99-A, MACHINIST X99 V9S, PR9-H White, Tangxi, Dual M.2 X99, X99 M-ATX E5, and E5 MR9A. The two dual-CPU listings emphasize SATA connections and do not provide explicit M.2 details, so buyers should verify those listings directly.
Can I mix ECC, RECC, and non-ECC DDR4 modules?
Do not assume that the three supported memory labels can be mixed or that any combination will boot at the intended speed. The MACHINIST listing warns that server and desktop memory cannot be used together. Match the processor's supported memory type with the board's rules and use a matched module set for the most predictable results.
What should I verify before buying a used X99 processor?
Check the exact processor model, supported motherboard BIOS or CPU list, thermal design power, memory compatibility, and whether the board is single-CPU or dual-CPU. Also confirm that the included cooler is suitable and that the case and power supply can handle the complete configuration. Socket shape alone does not confirm every platform requirement.
What accessories might be missing from an X99 motherboard package?
Accessories vary significantly among these listings. The MACHINIST X99 V9S does not include a user manual or CR2032 battery, and its TPM header only supports an ASUS module. The PR9-H White similarly excludes the manual and battery while including an I/O shield, cooler bracket, and SATA cable. Review the package list carefully before ordering missing parts.
Final Thoughts on Choosing the Best Lga 3 X99 Motherboard
The ASUS X99-E WS/USB 3.1 is the strongest overall option because it combines a four-way graphics link, high-speed USB 3.1, onboard M.2 storage, and useful maintenance diagnostics. The ASUS X99-A serves as the budget-focused ATX alternative, while the MACHINIST X99 V9S earns the premium distinction for its three NVMe slots, four-channel memory, and broad Xeon-oriented processor support.
For other requirements, the PR9-H White and Tangxi provide compact micro-ATX designs, the 490710 and second dual-CPU board suit specialized two-processor systems, and the Dual M.2 X99 emphasizes flexible memory and storage support. Prioritize processor compatibility, memory population rules, case dimensions, and expansion requirements before considering a board based on its chipset label alone.
Listings, stock, and prices can change, so confirm the current specification sheet, included accessories, BIOS support, and component availability before purchasing. A careful compatibility check is especially important for LGA 2011-3 systems because memory, processor, cooler, and operating-system support can vary significantly from one X99 board to another.