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Supermicro 2U barebone server, matte black front with twelve 3.5-inch drive trays

Supermicro

Supermicro SYS-521C-NR barebone server 12×3.5" 16 DIMM 5600 MHz 1200W

SKU CH-1ASP-5HHJ8 MPN SYS-521C-NR

A 2U barebone server holding twelve 3.5-inch drives with sixteen DDR5 slots at 5600 MHz and redundant 1200 W titanium power supplies

  • Single-socket LGA-4677 supports 4th/5th Gen Xeon up to 350 W TDP
  • 16 DIMM slots run DDR5 at 5600 MHz for high memory bandwidth
  • 12 front hot-swap 3.5" bays with optional Gen5 NVMe flexibility
  • Redundant Titanium 1200 W power supplies ensure continuous operation
  • OCP 3.0 AIOM plus dedicated IPMI LAN simplify network management

Single-socket Xeon barebone with 12 drive bays

The Supermicro SYS-521C-NR is a 2U server barebone built for a single LGA-4677 Intel Xeon Scalable processor up to 350W TDP. It targets infrastructure teams that need dense local storage and large memory capacity in a redundant power envelope. The Intel C741 chipset provides the platform foundation for compute or storage workloads.

Front hot-swap bays and AIOM networking simplify

Twelve front-accessible 3.5-inch SATA3 bays accept drives without tools; two of them can be configured as hybrid Gen5 NVMe slots with the correct backplane. A single OCP 3.0 AIOM slot with NCSI handles network connectivity alongside a dedicated IPMI LAN port. Installers must source a compatible AIOM card and any SAS controller separately, as neither is included.

DDR5-5600 across 16 DIMM slots sets the memory

Sixteen DIMM sockets support 3DS DDR5 RDIMM modules at up to 5600 MHz, defining the maximum memory bandwidth and capacity the platform can deliver. The single processor socket limits total memory channels to eight, so population rules and rank limits apply. Redundant 1200W Titanium power supplies constrain total system draw to the capacity of one unit for fail-safe operation.

How it compares

Measured against everything we stock in Barebone Servers & DIY Kits, at today’s prices. Recalculated every night.

Price $4,230.99
Pricier than about 72% of the 532 comparable items (median $2,503.49).

New to this? Buying server hardware with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Size & build
Shipping weight26.76 kg
Package size876 × 678 × 290 mm

Questions about this item

How do I confirm the server is operating correctly after initial setup?

Verify the IPMI LAN responds, check the BIOS POST screen for all 16 DDR5 DIMMs running at 5600 MHz, and ensure the redundant 1200W power supplies show healthy status in the management interface.

What components are included and what must I purchase separately for the SYS-521C-NR?

The barebone includes the chassis, motherboard with Intel C741 chipset, 12 front hot-swap 3.5-inch SATA3 bays, redundant Titanium 1200W power supplies, and a single AIOM slot with NCSI. You must add a Socket E LGA-4677 Xeon processor, DDR5 RDIMMs, storage drives, and an AIOM networking module.

Which AIOM module should I select for the OCP 3.0 slot in this server?

Choose any OCP 3.0 compliant AIOM card that supports NCSI; the motherboard provides a single AIOM slot with NCSI for networking, so select a module matching your required port count and speed.

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