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Supermicro 1U barebone server front view with twelve E3.S drive bays

Supermicro

Supermicro SSG-121E-NE3X12R barebone server 8 E3.S NVMe 4 E3.S CXL

SKU CH-JX49-ZYR5F MPN SSG-121E-NE3X12R

1U barebone with 8 E3.S NVMe and 4 E3.S CXL bays for dual Xeon 5th Gen CPUs, 32 DDR5 DIMM slots and two PCIe 5.0 x16 slots

  • Dual-socket Xeon scalability with 4677-pin LGA support
  • 32 DIMM slots enable up to 8TB DDR5-4800 ECC memory
  • Two PCIe 5.0 x16 slots plus dual OCP 3.0 AIOM connectors
  • 8 hot-swap E3.S NVMe bays plus 4 E3.S CXL bays
  • Redundant Titanium 1600W power supplies for uptime

Dual-socket 1U barebone for E3.S storage

The Supermicro SSG-121E-NE3X12R is a 1U barebone server designed for dense all-flash storage. It accepts dual 5th Generation Intel Xeon Scalable processors in LGA-4677 sockets with up to 270W TDP each. The chassis provides eight hot-swap E3.S 1T NVMe drive bays and four E3.S 2T CXL bays for memory expansion. Redundant Titanium 1600W power supplies are included.

Verify CPU cooler clearance

Before ordering, confirm that your chosen LGA-4677 heatsinks fit within a 1U height restriction. The system supports 32 DDR5-4800 ECC DIMM slots in a 2DPC configuration; plan memory kits to match the 256GB 3DS RDIMM maximum per slot for the full 8TB capacity. Ensure any OCP 3.0 SFF add-in cards align with the two AIOM connectors provided.

Two PCIe 5.0 x16 slots leave room for accelerators

The board exposes two full-length PCIe 5.0 x16 slots for GPUs, network adapters or additional storage controllers. Four E3.S 2T CXL bays free standard memory slots by hosting memory-expansion modules directly. Dual AIOM connectors allow OCP 3.0 SFF networking without consuming a PCIe slot. The 1600W redundant supply heads power the processors, memory and all twelve front bays.

How it compares

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

Price $5,172.99
Pricier than about 76% of the 532 comparable items (median $2,503.49).

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Specifications

Size & build
Shipping weight31.18 kg
Package size1030 × 605 × 200 mm

Questions about this item

Does the barebone include CPUs, memory or drives, or must they be purchased separately?

The unit ships as a barebone without processors, DIMMs or E3.S modules; you must supply dual Xeon CPUs, up to 32 DDR5-4800 ECC DIMMs and the NVMe or CXL drives yourself.

Should I populate the 8 E3.S NVMe bays, the 4 E3.S CXL bays, or both?

Use the eight 1T bays for standard NVMe storage and the four 2T bays for CXL-attached memory or accelerator devices; both sets operate simultaneously.

What does the 1600 W redundant power rating mean for a fully loaded 1U chassis?

Dual Titanium 1600 W supplies deliver full redundancy for dual 270 W CPUs, 32 DIMMs and all twelve E3.S bays under maximum load.

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