Best LGA4189 Motherboards in 2026: 7 Picks by Specs
The Supermicro MBD-X12SPA-TF-O is the best LGA4189 motherboard overall for its E-ATX layout, C621A chipset, and DDR4 memory support, making it a solid foundation for a single-socket Xeon Scalable workstation. We picked it from a pool of 7 LGA4189 boards by comparing socket count, form factor, RAM type, and onboard networking as stated by the sellers.
7 picks from 4 motherboards that match this guide with a price we can quote today. The prices below are current and each carries its read time.
Quick picks
| # | Pick | Motherboard | Price |
|---|---|---|---|
| 1 | Best overall | SUPERMICRO MBD-X12SPA-TF-O E-ATX Server Motherboard LGA 4189 C621A | |
| 2 | Best dual socket | AsRock Rack SP2C621D16-2T EEB Server Motherboard Dual Socket P+ | $1,027.10 price as of 2026-10-07 05:30 UTC (Details) |
| 3 | Best ATX with dual 10G | Supermicro X12SPI-TF ATX Server Motherboard | |
| 4 | Best micro-ATX | AsRock Rack SPC621D8U-2T Micro-ATX Server Motherboard Single Socket P+ | $791.21 price as of 2026-10-07 05:30 UTC (Details) |
| 5 | Best standard ATX single socket | AsRock Rack SPC621D8-2L2T ATX Server Motherboard | $676.00 price as of 2026-10-07 05:30 UTC (Details) |
| 6 | Best compact dual socket | Supermicro X12DDW-A6 Server Motherboard | |
| 7 | Best entry-level LGA4189 | X12DPL-i6 for Motherboard LGA-4189 Scalable Processors PCI-E 4.0 SATA3 |
The best fit for you
- For a single-socket workstation: You need one powerful Xeon Scalable CPU with room for E-ATX expansion. The Supermicro X12SPA-TF-O gives you a clean E-ATX base with C621A support. See pick 1
- For a dual-socket compute server: If you need two CPUs for heavy virtualization or rendering, the ASRock Rack SP2C621D16-2T is the only dual-socket board in this pool with dual 10G LAN. See pick 2
- For a compact micro-ATX server: In a small chassis, the ASRock Rack SPC621D8U-2T fits a single LGA4189 CPU into a micro-ATX board with DDR4 support. See pick 4
- For a budget rack build: The ASRock Rack SPC621D8-2L2T offers a standard ATX footprint with dual LAN, giving you a straightforward single-socket option without extra frills. See pick 5
Our 7 picks
1 Best overall
SUPERMICRO MBD-X12SPA-TF-O E-ATX Server Motherboard LGA 4189 C621A
- Socket
- LGA4189
- Form factor
- E-ATX
- Memory type
- DDR4
This Supermicro board pairs the C621A chipset with an E-ATX form factor, making it a strong single-socket pick for a workstation or server. It supports DDR4 memory and is one of the most clearly specified boards in this group.
Pros
- E-ATX form factor with room for many expansion cards
- C621A chipset designed for 3rd Gen Intel Xeon Scalable
- DDR4 memory support stated
- Supermicro is an established server motherboard maker
Cons
- Larger than ATX, requires a full tower or rack chassis
- Onboard network controller details not stated by the seller
Good fit if
- Builders needing a single-socket E-ATX server or workstation
- Users who prefer a proven brand for long-term reliability
Skip if
- You need a dual-socket setup
- You are building in a compact ATX or micro-ATX case
Verdict: The Supermicro MBD-X12SPA-TF-O is the most balanced single-socket LGA4189 board here for most professional builds.
2 Best dual socket
AsRock Rack SP2C621D16-2T EEB Server Motherboard Dual Socket P+
- Socket
- LGA4189
- Memory type
- DDR4
$1,027.10 price as of 2026-10-07 05:30 UTC (Details)
This ASRock Rack board is the only EEB dual-socket option in the pool, letting you install two LGA4189 Xeon Scalable processors. It also includes two 10G ports, which is rare among these picks.
Pros
- Dual LGA4189 sockets for high core counts
- Dual 10G LAN ports onboard
- C621A chipset for 3rd Gen Xeon Scalable
- EEB form factor offers extensive expansion
Cons
- EEB is larger than standard ATX, so case compatibility is limited
- Memory capacity and slot count not stated by the seller
Good fit if
- Users running heavy virtualization or HPC workloads
- Those who want built-in 10G networking without extra cards
Skip if
- You only need one CPU
- You plan to use a standard ATX case
Verdict: If you need two LGA4189 CPUs and fast onboard networking, the ASRock Rack SP2C621D16-2T is the clear choice.
3 Best ATX with dual 10G
This Supermicro ATX board provides a single LGA4189 socket and two 10GBase-T ports, making it a compact yet high-bandwidth option for a server or high-end workstation.
Pros
- ATX form factor fits most tower cases
- Dual 10GBase-T ports for high-speed networking
- C621A chipset support for 3rd Gen Xeon Scalable
- DDR4 memory support stated
Cons
- Single socket only
- Expansion slot count not listed by the seller
Good fit if
- Home lab or small office servers needing 10G networking
- Users who want a standard ATX board without E-ATX bulk
Skip if
- You require dual processors
- You need more than the listed onboard LAN options
Verdict: The Supermicro X12SPI-TF is the best ATX board here for users who want 10G networking without moving to a larger form factor.
4 Best micro-ATX
AsRock Rack SPC621D8U-2T Micro-ATX Server Motherboard Single Socket P+
- Socket
- LGA4189
- Form factor
- mATX
- Memory type
- DDR4
$791.21 price as of 2026-10-07 05:30 UTC (Details)
This ASRock Rack board is the only micro-ATX option in the pool, giving you a compact LGA4189 platform with DDR4 support and a C621A chipset.
Pros
- Micro-ATX form factor fits small chassis
- Single LGA4189 socket for 3rd Gen Xeon Scalable
- C621A chipset
- DDR4 memory support
Cons
- Limited expansion slots due to small size
- Only one socket
Good fit if
- Compact server builds where space is tight
- Users who want a low-profile LGA4189 workstation
Skip if
- You need multiple GPU or high-speed storage expansion
- You plan to install more than one CPU
Verdict: For a small footprint LGA4189 build, the ASRock Rack SPC621D8U-2T is the only micro-ATX pick available.
5 Best standard ATX single socket
AsRock Rack SPC621D8-2L2T ATX Server Motherboard
- Socket
- LGA4189
- Form factor
- ATX
- Memory type
- DDR4
$676.00 price as of 2026-10-07 05:30 UTC (Details)
This ASRock Rack ATX board offers a straightforward single-socket LGA4189 layout with dual LAN, making it a reliable choice for standard server cases without extra features you may not need.
Pros
- Standard ATX size with broad case compatibility
- Dual LAN ports onboard
- C621A chipset
- DDR4 memory support
Cons
- No 10G networking options listed
- Only one socket
Good fit if
- Basic server or storage builds
- Users who want a familiar ATX layout
Skip if
- You need 10G networking
- You require dual CPUs
Verdict: The ASRock Rack SPC621D8-2L2T is a dependable single-socket ATX board for simple LGA4189 deployments.
6 Best compact dual socket
This Supermicro board provides dual LGA4189 sockets in a more compact design than the EEB ASRock board, though the exact form factor is not stated. It still offers C621A support and DDR4 memory.
Pros
- Dual LGA4189 sockets for high core counts
- C621A chipset
- DDR4 memory support
- Supermicro reliability
Cons
- Form factor not stated by the seller
- No onboard network controller details provided
Good fit if
- Users who need two CPUs but want a board that may fit a smaller chassis than EEB
- Those who can work with an unstated form factor
Skip if
- You need a guaranteed ATX or E-ATX size
- You require onboard 10G networking
Verdict: The Supermicro X12DDW-A6 is a sensible dual-socket option if you are flexible on board size and do not need specific onboard networking.
7 Best entry-level LGA4189
This unbranded board offers a basic LGA4189 platform with dual i210 LAN and SATA3 ports, making it a minimal choice for users who just need a working socket without extra server features.
Pros
- Dual i210 LAN controllers for basic networking
- SATA3 support for storage
- Simple layout
- PCIe 4.0 support as stated
Cons
- No brand recognition or warranty information from the seller
- Form factor not stated
- Chipset not named in the listing
Good fit if
- Users building a bare-bones LGA4189 system
- Those who do not need advanced server features
Skip if
- You require a known brand for enterprise reliability
- You need specific expansion or networking options
Verdict: The X12DPL-i6 is a basic LGA4189 board that works for simple builds, but it lacks the assurance of a major motherboard maker.
Specifications side by side
| # | Motherboard | Socket | Form factor | Memory type |
|---|---|---|---|---|
| 1 | SUPERMICRO MBD-X12SPA-TF-O E-ATX Server Motherboard LGA 4189 C621A | LGA4189 | E-ATX | DDR4 |
| 2 | AsRock Rack SP2C621D16-2T EEB Server Motherboard Dual Socket P+ | LGA4189 | not stated | DDR4 |
| 3 | Supermicro X12SPI-TF ATX Server Motherboard | LGA4189 | ATX | DDR4 |
| 4 | AsRock Rack SPC621D8U-2T Micro-ATX Server Motherboard Single Socket P+ | LGA4189 | mATX | DDR4 |
| 5 | AsRock Rack SPC621D8-2L2T ATX Server Motherboard | LGA4189 | ATX | DDR4 |
| 6 | Supermicro X12DDW-A6 Server Motherboard | LGA4189 | not stated | DDR4 |
| 7 | X12DPL-i6 for Motherboard LGA-4189 Scalable Processors PCI-E 4.0 SATA3 | LGA4189 | not stated | not stated |
How the picks were chosen
We started with a pool of 7 LGA4189 motherboards currently listed with live prices. Each entry was reviewed for socket compatibility, chipset generation, form factor, and memory type. We then shortlisted boards based on whether they clearly state support for Intel Xeon Scalable processors and offer a defined form factor such as ATX, E-ATX, or mATX. Prices are read from the store listing at the time of writing and are subject to change. No unit in this guide has been tested by the site; selections are based solely on published specifications and seller listings.
Picking the right one for you
Socket and chipset
LGA4189 is the socket for Intel Xeon Scalable processors, specifically the 3rd generation (Ice Lake-SP) family. The chipset on these boards, usually C621A, provides the PCIe lanes, memory channels, and I/O features that the CPU needs. When choosing a board, confirm that the chipset matches your CPU generation and that the socket type is LGA4189. The C621A chipset is designed for 3rd Gen Xeon Scalable, so any board with that chipset is a safe match.
Form factor
LGA4189 motherboards come in several sizes: E-ATX, ATX, micro-ATX, and sometimes custom server sizes. E-ATX boards offer more expansion slots and are common in dual-socket configurations. ATX boards are easier to fit in standard tower cases, while micro-ATX boards are useful for compact servers. Before buying, measure your chassis and check the stated form factor from the seller. In this pool, the ASRock Rack SPC621D8U-2T is the only micro-ATX board, while the ASRock SP2C621D16-2T is the only EEB model.
Memory support
All boards in this pool support DDR4 memory, which is the standard for LGA4189 platforms. The exact number of DIMM slots and maximum capacity are not always listed by sellers, so you may need to check the manufacturer's spec sheet. For a 3rd Gen Xeon Scalable CPU, you typically want at least 8 DIMM slots to take full advantage of the eight memory channels. If the seller does not specify memory capacity, contact the maker or look up the manual before purchasing.
Networking and expansion
Server motherboards often include multiple Ethernet ports, ranging from 1G to 10G or faster. If your workload involves large file transfers or virtualization, onboard 10G ports save the cost of add-in NICs. For example, the Supermicro X12SPI-TF and the ASRock SP2C621D16-2T both include dual 10G ports. Also consider PCIe slots for GPUs, storage controllers, or additional NICs. Since not all sellers list the number of PCIe slots, you may need to consult the manufacturer's page to verify expansion options.
Questions
What is LGA4189?
LGA4189 is a land grid array socket from Intel used for Xeon Scalable processors, specifically the 3rd generation Ice Lake-SP series. It replaced the earlier LGA3647 socket and supports PCIe 4.0, eight memory channels, and up to 40 cores per CPU. Motherboards with this socket usually use the Intel C621A chipset, which is designed for these server CPUs.
Can I use DDR5 memory on an LGA4189 motherboard?
No. LGA4189 platforms are designed for DDR4 memory. All the boards in this pool state DDR4 support. DDR5 is used on newer sockets such as LGA4677 (for Xeon Scalable 4th Gen) or LGA1700/1851 for consumer CPUs. If you need DDR5, you must look at a different socket.
How many CPUs can I install on these boards?
Most LGA4189 boards are single-socket, meaning they hold one Xeon Scalable processor. A few boards, such as the ASRock Rack SP2C621D16-2T and the Supermicro X12DDW-A6, have two sockets, allowing you to run two CPUs. Dual-socket boards are useful for high-core-count workloads like massive virtualization or rendering, but they require a larger board and more power.
What is the difference between C621 and C621A chipsets?
The C621 chipset is used for first and second generation Xeon Scalable processors, while the C621A is for 3rd generation Xeon Scalable. C621A adds support for PCIe 4.0 and more I/O lanes, and it is generally required for Ice Lake-SP CPUs. If you have a 3rd Gen Xeon Scalable processor, you should look for a board with a C621A chipset.
Revision notes
- : First published.