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Silver 2U rack server front with twelve 3.5-inch drive bays

Supermicro

Supermicro SYS-621C-TN12R barebone server, 12×3.5″ bays, 16 DIMMs, 4 PCIe 5.0 x16

SKU CH-3JDE-0VQ6D MPN SYS-621C-TN12R

2U barebone server with 12 hot-swap 3.5″ NVMe/SAS/SATA bays, 16 DDR5-4800 DIMM slots and four PCIe 5.0 x16 expansion slots

  • 12 hot-swap 3.5″ bays support NVMe, SAS and SATA drives
  • 16 DIMM slots enable up to 4 TB DDR5-4800 ECC memory
  • Dual LGA-4677 sockets for 4th Gen Intel Xeon Scalable processors
  • 4 PCIe 5.0 x16 slots plus 2 OCP 3.0 AIOM slots
  • 2 PCIe 5.0 x4 M.2 slots add fast local storage

Dual-socket barebone for dense storage

The Supermicro SYS-621C-TN12R is a 2U server barebone that holds two LGA-4677 Xeon processors and sixteen DDR5-4800 RDIMM slots. Twelve front bays accept 3.5-inch or 2.5-inch NVMe, SAS or SATA drives in any mix. Four PCIe 5.0 x16 slots plus two OCP 3.0 AIOM slots give room for GPU, storage or networking cards. It suits builders who need high drive count and dual-socket compute in a compact rack unit.

Replaces single-socket or smaller-bay chassis

Moving from a single-socket platform doubles thread count and memory channels while keeping the same rack height. The jump is worth it when workloads demand more than eight memory channels or when twelve hot-swap bays remove the need for external JBODs. Builders staying with fewer than eight drives or a single processor gain no advantage from the extra cost and power draw.

Standard rack-mount install with cable routing care

The chassis slides into a four-post rack using included rails; no special tools are required. CPUs, memory and drives install from the front and top without removing the board. The dense bay layout leaves little space for power cables, so route them before seating drives. AIOM cards must match the OCP 3.0 pin-out or they will not seat.

Highlights

  • 12 hot-swap 3.5″ bays support NVMe, SAS and SATA drives
  • 16 DIMM slots enable up to 4 TB DDR5-4800 ECC memory
  • Dual LGA-4677 sockets for 4th Gen Intel Xeon Scalable processors
  • 4 PCIe 5.0 x16 slots plus 2 OCP 3.0 AIOM slots
  • 2 PCIe 5.0 x4 M.2 slots add fast local storage

Specifications

No published specifications for this item yet.

Questions about this item

What rack depth and rail kit are required for the 12-bay 2U chassis?

The 2U chassis accepts standard rack rails; verify your cabinet depth clears the 12 front hot-swap bays and rear I/O.

Which CPU cooler clearance and socket preparation steps apply to the dual LGA-4677 sockets?

Install processors into both LGA-4677 sockets before fitting the heatsinks; follow the torque sequence in the system manual.

How are the 16 DDR5-4800 RDIMM slots populated for maximum 4 TB capacity?

Fill all 16 slots with 3DS ECC RDIMMs; the memory controller supports up to 4 TB total across both processors.

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