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ASRock Rack

ASRock Rack SP2C621D16-2T EEB server motherboard dual LGA 4189 8+8 DDR4 3200

SKU CH-29W0-K2X4F MPN SP2C621D16-2T

EEB dual-socket server motherboard with 16 DDR4 3200 DIMM slots, five PCIe 4.0 x16 slots, 14 SATA ports and dual 10 GbE LAN

  • ProcessorSupports 3rd Gen Intel Xeon Scalable processors
  • Form factorEEB
  • CPU socketLGA 4189
  • Network speed10 Gbit/s
  • Supported CPU count2
  • ChipsetIntel C621A
  • Dual LGA 4189 sockets enable two 3rd Gen Xeon processors
  • 8+8 DDR4 3200 DIMM slots for high-capacity memory
  • Five PCIe 4.0 x16 slots plus one x8 for expansion
  • Fourteen SATA 6.0Gb/s ports with RAID 0/1/5/10
  • Dual 10GbE LAN via Intel X550-AT2

Dual LGA 4189 server board for 3rd Gen Xeon

The ASRock Rack SP2C621D16-2T is an EEB form-factor motherboard built around the Intel C621A chipset. It accepts two 3rd Gen Intel Xeon Scalable processors in LGA 4189 sockets and provides sixteen DDR4 3200 DIMM slots in a 1DPC layout. Five PCIe 4.0 x16 slots and one x8 slot deliver high-bandwidth expansion for compute accelerators or networking cards. Dual 10 GbE ports driven by an Intel X550-AT2 controller handle heavy data traffic.

Suited for dense virtualization and storage nodes

This board targets builders who need dual-socket performance with abundant memory capacity and fast networking. The fourteen SATA 6.0 Gb/s ports and two SlimSAS connectors support large drive arrays without add-in HBAs. Buyers who require more than one M.2 device or who need integrated Wi-Fi should look at alternative platforms. Systems that must fit in standard ATX chassis cannot use the 12 x 13 inch EEB outline.

Sixteen DDR4 3200 slots in 1DPC configuration

Memory capacity tops out at sixteen modules running at 3200 MT/s, with each channel populated by a single DIMM for signal integrity. RDIMM, LRDIMM and Intel Optane persistent memory are all supported. This density decides whether the platform can hold the working set for in-memory databases or large VM fleets.

How it compares

Measured against everything we stock in Server & Workstation Boards, at today’s prices. Recalculated every night.

Price $742.99
Pricier than about 90% of the 776 comparable items (median $254.49).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameAsRock Rack
Model nameSP2C621D16-2T
Processor
ProcessorSupports 3rd Gen Intel Xeon Scalable processors
CPU socketLGA 4189
Supported CPU count2
ChipsetIntel C621A
Memory
DDR4 memory supportDDR4 3200
Storage
SATA ports14 x SATA 6.0Gb/s
SATA and RAID support0/1/5/10
M.2 slots1 M-key (PCIe4.0 x4); Support 22110/2280 form factor [CPU0]
Graphics
Onboard video chipAspeed AST2500
Connectivity
Network speed10 Gbit/s
Ethernet controllerIntel X550-AT2
Maximum network speed10 Gbit/s
Ports & slots
Number of DDR4 slots8+8 DIMM slots (1DPC)
PCIe 4.0 x16 slotsSLOT6: PCIe4.0 x16 [CPU1]
SLOT5: PCIe4.0 x16 [CPU1]
SLOT4: PCIe4.0 x16 [CPU1]
SLOT3: PCIe4.0 x16 [CPU0]
SLOT2: PCIe4.0 x16 [CPU0]
Rear panel ports1 x D-Sub / 2 x LAN (RJ45) / 2 x USB 3.2 Gen 1 Type-A
Size & build
Form factorEEB
Width and length12 in × 13 in
Shipping weight3.00 kg
Package size382 × 360 × 67 mm
More details
PCI express x8SLOT1: PCIe4.0 x8 [CPU0]
SAS2 SlimSAS (PCIe4.0 × 8) [CPU0]

Questions about this item

Should I populate all 16 DDR4 3200 slots or start with fewer modules?

The board has 8+8 DIMM slots running 1DPC, so each slot connects directly to a memory controller. Filling all 16 slots gives maximum capacity and bandwidth, but you can start with a smaller matched set per CPU and add later.

What does the dual LGA 4189 layout mean for actual throughput?

Two sockets each drive their own PCIe 4.0 lanes — five x16 slots and one x8 slot split between the CPUs — so GPU, storage or networking cards can run at full Gen 4 speed without sharing bandwidth across sockets.

How fast are the onboard 10GbE ports in practice?

The Intel X550-AT2 controller provides two RJ45 ports at 10 Gbps line rate, so sustained throughput approaches 10 Gbps per port with compatible cabling and switch partners.

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