Best LGA3647 Motherboards in 2026: 4 Picks Compared
The top pick here is the Supermicro X11DDW-L: it is the only board in this roundup from an established server maker, it is listed as a dual-socket LGA3647 design on the Intel C621 chipset, and the listing states support for up to 1.5TB of memory. It suits a workstation or home server build where a known brand matters. The four boards below were chosen from seller-published specifications: socket, chipset, memory support and compatibility claims. Prices shown are live from the listing; no unit in this guide was tested.
4 picks from 2 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 MOTHERBOARD MBD-X11DDW-L-B XEON DUAL SOCKET LGA3647 C621 | |
| 2 | Best for dual CPU with many memory slots | Gaming Motherboard Fit for ASUS Z11PR-D16 Motherboard Support Xeon Gold | $2,128.90 price as of 2026-10-07 05:57 UTC (Details) |
| 3 | Best for TYAN system replacement | Compatible for TYAN S7106 | $259.99 price as of 2026-10-07 05:42 UTC (Details) |
| 4 | Best for part-number replacement | Workstation Motherboard C621 LGA3647 Replacement Part 00FC947 |
The best fit for you
- For a known-brand server build: If you want a board from an established server vendor and can pay more, the Supermicro X11DDW-L is the only brand-name option in this list. See pick 1
- For a dual-CPU workstation with many memory slots: The TYTMSCA board states support for dual Xeon Gold or Silver processors and 16 DDR4 slots, if you need a large amount of RAM. See pick 2
- For a TYAN system replacement: If you have a TYAN S7106 chassis and need a direct replacement, the RXJPASD board is sold as compatible with that model. See pick 3
Our 4 picks
1 Best overall
The Supermicro X11DDW-L is the only board here from a server maker, and its listing states dual LGA3647 sockets, the Intel C621 chipset, and support for up to 1.5TB of DDR4. That combination of brand recognition and a specific memory ceiling makes it the most trustworthy choice for a new build.
Pros
- Dual LGA3647 sockets stated
- Intel C621 chipset named in the listing
- Memory support up to 1.5TB, the largest in this list
- Manufactured by Supermicro, an established server vendor
Cons
- Price is not stated by the seller in the listing
- No memory type or speed detailed in the specifications
- Likely requires a full server chassis, not a standard desktop case
Good fit if
- Users who prioritize a known brand for reliability
- Those building a dual-Xeon workstation or server with high memory capacity
Skip if
- You need a board with built-in Wi-Fi or USB4, which this listing does not mention
- You are on a tight budget; the price is the highest in this list
Verdict: The Supermicro X11DDW-L is the best overall LGA3647 board here because it pairs a trusted brand with a clear dual-socket design and a high memory ceiling.
2 Best for dual CPU with many memory slots
Gaming Motherboard Fit for ASUS Z11PR-D16 Motherboard Support Xeon Gold
- Socket
- LGA3647
- Memory type
- DDR4
$2,128.90 price as of 2026-10-07 05:57 UTC (Details)
The TYTMSCA board is listed as supporting dual Xeon Gold 5218 or Silver 4210 processors, with 16 DDR4 slots on the Intel C621 chipset. It is the only board in this roundup that gives a specific processor model range and a memory slot count, which makes it a concrete option for a dual-CPU build.
Pros
- Dual CPU support explicitly stated (Xeon Gold 5218, Silver 4210)
- 16 DDR4 memory slots, the most in this list
- Intel C621 chipset named in the listing
Cons
- Listed as 'fit for ASUS Z11PR-D16', not as an ASUS product
- No maximum memory capacity stated
- Brand is not a known motherboard maker
Good fit if
- Users who need a dual-processor board with many DIMM slots for virtualization or heavy multitasking
- Those comfortable with a third-party board that is advertised for a specific Supermicro or ASUS form factor
Skip if
- You require a board from a named manufacturer
- You need a single-socket board for a simpler build
Verdict: This TYTMSCA board is the best pick for a dual-CPU system when you want a concrete processor list and 16 memory slots, though it is a clone product.
3 Best for TYAN system replacement
Compatible for TYAN S7106
- Socket
- LGA3647
- Memory type
- DDR4
$259.99 price as of 2026-10-07 05:42 UTC (Details)
The RXJPASD board is sold explicitly as compatible with the TYAN S7106, a known dual LGA3647 server board. It states dual LGA3647 sockets and DDR4 memory, and it is the only listing here that targets a specific TYAN model, making it a direct replacement candidate.
Pros
- Explicitly marketed as compatible with TYAN S7106
- Dual LGA3647 sockets stated
- DDR4 memory support noted
Cons
- No chipset named in the listing
- Compatibility is a claim, not a guarantee
- Brand is not a recognized motherboard manufacturer
Good fit if
- Users who already own a TYAN S7106 and need a replacement board
- Those looking for a low-cost dual-socket board for a project without brand requirements
Skip if
- You need a board with a clearly stated chipset
- You prefer buying from an established maker
Verdict: This RXJPASD board is the best choice for a TYAN S7106 replacement, but its lack of a named chipset makes it a gamble for new builds.
4 Best for part-number replacement
The Feikteey board is sold as a replacement part with the part number 00FC947, and it names the Intel C621 chipset in its listing. It is the only board here that gives a specific replacement part identifier, which helps if you need to match an existing server's component.
Pros
- Intel C621 chipset is named in the listing
- Specific replacement part number 00FC947 is stated
- Clear LGA3647 socket designation
Cons
- No memory capacity or speed given
- Brand is not a known motherboard maker
- High price for a board with limited stated specifications
Good fit if
- Users who need to match a specific server part number
- Those repairing a system that originally used the 00FC947 board
Skip if
- You want a board with more detailed memory or expansion specs
- You are looking for the lowest-cost option in this list
Verdict: This Feikteey board is the pick for replacing a known part number, but its sparse specifications and high price limit its appeal for new builds.
Specifications side by side
| # | Motherboard | Socket | Form factor | Memory type |
|---|---|---|---|---|
| 1 | SUPERMICRO MOTHERBOARD MBD-X11DDW-L-B XEON DUAL SOCKET LGA3647 C621 | LGA3647 | not stated | not stated |
| 2 | Gaming Motherboard Fit for ASUS Z11PR-D16 Motherboard Support Xeon Gold | LGA3647 | not stated | DDR4 |
| 3 | Compatible for TYAN S7106 | LGA3647 | not stated | DDR4 |
| 4 | Workstation Motherboard C621 LGA3647 Replacement Part 00FC947 | LGA3647 | not stated | not stated |
How the picks were chosen
This guide covers the four LGA3647 listings that matched the socket filter in the catalogue. Each board was shortlisted against three questions: does the listing name the exact socket, which chipset does it claim, and does it state dual-processor support or a memory ceiling. A board with a named chipset and a clear compatibility statement ranked ahead of one with only a socket line. One board comes from an established maker, Supermicro; the other three are sold as replacements or compatible parts, and each is described as such so you can judge the risk. Prices on this page are read live from the store listings and update with time, so they reflect the price at the moment you open the page. No unit was tested.
Picking the right one for you
Understand the LGA3647 socket
LGA3647 is the socket used by Intel Xeon Scalable processors (Skylake-SP and later). It is a large, rectangular socket that supports two types of mounting: the narrow and square ILM designs. When you pick a board, check the specific processor generation you plan to use. Intel's processor naming guide explains the SKU suffixes, but the socket itself is fixed for LGA3647. All four boards here are listed as LGA3647, so they should physically fit compatible Xeon CPUs, but confirm the processor model against the board's own compatibility list if one is provided.
Check the chipset: C621 and its role
The Intel C621 chipset is the server chipset associated with LGA3647 Xeon Scalable systems. It supports dual-socket configurations, multiple PCIe lanes, and ECC memory. Not all LGA3647 boards use C621; some use C622, but C621 is common. In this guide, the Supermicro, TYTMSCA, and Feikteey boards explicitly name C621, while the TYAN-compatible board does not state its chipset. A named chipset gives you a baseline for expected features, but always verify with the board's detailed specs before buying.
Memory capacity and type
LGA3647 boards use DDR4 ECC memory, but the number of slots and the maximum capacity vary. The Supermicro X11DDW-L lists a maximum of 1.5TB, while the TYTMSCA board offers 16 slots without a capacity number. The other two boards do not state memory support in their specifications. If you need a lot of RAM, prioritize boards with more DIMM slots and a stated maximum. Remember that the memory speed also depends on the CPU you install.
Dual vs. single processor support
All four boards in this list are marketed as dual LGA3647 designs, but always confirm the exact processor support. For example, the TYTMSCA board names Xeon Gold 5218 and Silver 4210, while the Supermicro board is generic. Some LGA3647 boards support only one CPU even if the socket is the same, so check that the listing explicitly says 'dual socket' and that the chipset (like C621) actually enables that feature.
Compatibility and replacement parts
Two of these boards are sold as replacement or compatible parts. The Feikteey board is a replacement part with a specific number (00FC947), likely for a branded server. The TYAN-compatible board is for TYAN S7106. These are not new designs from the original makers; they are third-party boards that claim to fit those chassis. If you are repairing a system, a direct replacement can be a good option, but you may need to check BIOS updates, LAN drivers, and physical dimensions. For a new build, a board from an original server maker like Supermicro is safer.
Questions
What is an LGA3647 motherboard?
LGA3647 is a socket design from Intel used for Xeon Scalable processors. Motherboards with this socket support a wide range of server and workstation CPUs, commonly in single- or dual-socket configurations. They typically use Intel's C621 or C622 chipsets and support ECC DDR4 memory. This guide covers boards that are listed as LGA3647, but you should verify the exact processor and chipset compatibility before purchase.
Can I use an LGA3647 motherboard for gaming?
LGA3647 boards are designed for servers and workstations, not consumer gaming. They use Xeon processors which can work for gaming, but they lack the overclocking features and consumer I/O of desktop boards. Gaming-specific features like high-speed USB4 or Wi-Fi are rarely present, and you may need a separate graphics card. The TYTMSCA board in this list is labeled 'gaming', but that likely means it is intended for a workstation-style build with a discrete GPU, not that it has gaming-oriented components.
How much RAM can an LGA3647 motherboard support?
It depends on the board and the CPU. The Supermicro X11DDW-L in this guide states a maximum of 1.5TB, while the TYTMSCA board offers 16 slots but no maximum. Other LGA3647 boards can support 1TB or more with the right Xeon processors. Check the board's memory QVL and the CPU's memory controller limits, since Xeon Scalable processors typically support up to 768GB per socket depending on the model.
Are these LGA3647 boards available from trusted brands?
This guide includes a Supermicro X11DDW-L, which is a product of an established server maker. The Feikteey, TYTMSCA, and RXJPASD boards are sold by third-party sellers and are not from recognized motherboard manufacturers. They are often marketed as replacements or compatible parts. If reliability and support are your priorities, look for boards from established makers like Supermicro, ASUS, Gigabyte, or ASRock Rack, though such options may have different price points and availability.
Revision notes
- : First published.