ASRock Rack EEB Dual LGA 4189 Review: Specs, Pros and Cons

What stands out

• Dual Socket P+ (LGA 4189) for 3rd Gen Intel Xeon Scalable CPUs
• 16 DIMM slots supporting DDR4 RDIMM, LRDIMM, and Intel Optane
• 5 x PCIe 4.0 x16 and 1 x PCIe 4.0 x8 slots
• Dual 10G Ethernet connectivity
• EEB form factor design

Who it fits

Key specs explained

Dual Socket P+ (LGA 4189)

This board holds two processors in the LGA 4189 socket. You get double the core count and memory channels for heavy workloads. This setup suits virtualization, database servers, and high-performance computing tasks. Single-socket boards offer less raw processing power, so this dual design is best for enterprise environments needing maximum throughput.

EEB

EEB is a large form factor designed for server chassis. It provides more mounting points and space for expansion cards than standard ATX boards. This size supports robust cooling and additional PCIe slots. You should choose this if your rack or tower case accommodates larger boards, ensuring stability for dense server configurations.

DDR4

The board uses DDR4 memory modules, specifically supporting RDIMM and LRDIMM types. This standard offers high capacity and reliability for server applications. You can install up to sixteen DIMMs across eight slots per CPU. DDR4 is the current standard for this generation of Intel Xeon Scalable processors, balancing speed and cost for enterprise use.

PCIe 4.0

This interface doubles the data transfer speed compared to PCIe 3.0. You get faster connections for NVMe drives, network cards, and GPUs. This bandwidth is crucial for modern storage and expansion devices. When comparing motherboards, PCIe 4.0 ensures your hardware does not bottleneck on data throughput, making it ideal for high-speed server operations.

Physical design and build quality

The ASRock Rack SP2C621D16-2T uses an EEB form factor. This size is larger than standard ATX boards. You need a server chassis that accommodates EEB dimensions. The listing states the board weighs 1.8 pounds. This mass comes from the dense component layout required for dual-socket support. The physical footprint ensures stability for heavy server workloads.

According to the listing, the board features a C621A chipset. This chipset manages the data flow between the two LGA 4189 sockets and the peripheral slots. The layout prioritizes expansion over compactness. You get five PCIe 4.0 x16 slots and one PCIe 4.0 x8 slot. These slots allow for extensive GPU or network card configurations. Two SlimSAS connectors provide high-speed storage connectivity via PCIe 4.0 x8 paths. This design supports fast NVMe drives in RAID arrays.

Memory expansion is handled by eight DIMM slots per CPU. You can install DDR4 RDIMM, LRDIMM, or Intel Optane Persistent Memory. This flexibility lets you balance capacity and speed for specific server tasks. A single M.2 slot supports PCIe 4.0 x4 devices in 22110 or 2280 form factors. This offers local storage for the operating system or cache. The overall build focuses on durability and connectivity for data center environments.

Setup and everyday use

Installing this dual-socket board requires careful planning. The EEB form factor is larger than standard ATX designs. You must ensure your server chassis supports these dimensions. The listing notes a weight of 1.8 pounds. This mass comes from the dense component layout and robust construction. You need a compatible power supply and cooling solution for two LGA 4189 sockets.

Memory setup involves eight plus eight DIMM slots. You can populate these with DDR4 RDIMM or LRDIMM modules. The board also supports Intel Optane Persistent Memory. This allows for high-capacity, low-latency storage tiers. You configure the memory channels to match your workload needs. Dual sockets mean you manage memory across two processors. This setup suits virtualization and database servers.

Connectivity is handled through multiple PCIe lanes. You get five PCIe 4.0 x16 slots and one x8 slot. Two SlimSAS ports offer additional PCIe 4.0 x8 bandwidth. A single M.2 slot supports PCIe 4.0 x4 drives in 22110 or 2280 form factors. This provides fast storage expansion. Dual 10G Ethernet ports handle network traffic. These specs imply a focus on high-throughput data processing. You use this board for dense computing tasks. It is not designed for consumer desktops. The hardware supports continuous operation in server environments.

Before You Buy This Server Board

Before purchasing this ASRock Rack EEB Dual LGA 4189 Server Board, verify your infrastructure supports its specific requirements. The EEB form factor is larger than standard ATX, so you must confirm your server chassis can accommodate these dimensions. The listing notes a weight of 1.8 pounds, which implies a robust build but also requires sturdy mounting hardware. You need compatible 3rd Gen Intel Xeon Scalable processors to utilize the dual LGA 4189 sockets. Ensure your power supply delivers sufficient wattage for two high-performance CPUs and sixteen DDR4 memory slots. This board is designed for server workloads, not typical desktop gaming or office use. It fits alongside other high-density computing options in our 1 Motherboards & Processors guide. Check that your network infrastructure supports the dual 10G Ethernet ports. Verify that your cooling solution handles the heat generated by dual sockets. This platform suits virtualization, database servers, and high-performance computing tasks. It is not suitable for standard consumer PCs.

Check before you buy

• Confirm your server chassis supports the EEB form factor dimensions.
• Ensure you have compatible 3rd Gen Intel Xeon Scalable CPUs.
• Verify your power supply handles dual socket power requirements.
• Check that your cooling solution manages dual socket heat output.
• Confirm your network infrastructure supports the dual 10G Ethernet ports.

The product at a glance

1

ASRock Rack EEB Dual LGA 4189 Server Board

Best for: Dual-socket server builds requiring high expansion

CPU Socket

Dual Socket P+ (LGA 4189)

Chipset

C621A

Form Factor

EEB

Memory Type

DDR4

PCIe Version

PCIe 4.0

M.2 Slots

1

View on Amazon: ASRock Rack EEB Dual LGA 4189 Server Board Affiliate link

This ASRock Rack EEB motherboard supports dual 3rd Gen Intel Xeon Scalable processors via two LGA 4189 sockets. It features a C621A chipset and eight plus eight DDR4 DIMM slots for substantial memory capacity. You get five PCIe 4.0 x16 slots and dual 10G Ethernet ports. This board is built for dense server environments where high core counts and expandability are critical.

Pros

• Dual LGA 4189 sockets for two 3rd Gen Intel Xeon Scalable CPUs
• 16 DDR4 DIMM slots supporting RDIMM and LRDIMM
• Five PCIe 4.0 x16 expansion slots plus one x8 slot
• Dual 10G Ethernet connectivity
• SlimSAS and M.2 support for storage flexibility

Cons

• Only one M.2 slot available for NVMe storage
• Heavy build at 1.8 pounds
• Large EEB form factor limits case compatibility

Good fit if

• You need dual-socket performance for virtualization or database workloads
• You require extensive PCIe expansion for multiple GPUs or cards
• You are building a high-density server rack

Skip if

• You are building a standard desktop PC
• You need multiple M.2 slots for fast storage
• You require a smaller ATX or E-ATX form factor

Verdict: ASRock Rack Dual LGA 4189 Server Motherboard is a specialized tool for data centers needing dual-socket power and massive PCIe lanes. It fits engineers deploying high-performance computing nodes rather than general users.

Specifications side by side

Frequently asked questions

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