ASRock Rack 1U4L2E-B650 RPSU 1U barebone server

Compact 1U server barebone

The ASRock Rack 1U4L2E-B650 RPSU is a 1U rackmount chassis designed for general-purpose workloads. It accepts a single AMD EPYC 4004 or 4005 processor and Ryzen 9000, 8000 or 7000 series CPUs in the LGA 1718 socket. Two 288-pin DIMM slots support DDR5 5600 memory up to 192 GB with ECC. The platform targets builders who need dense compute in a single rack unit without integrated graphics or audio.

Redundant 80-PLUS Platinum power

Dual hot-swap 650 W slim power supplies share the load in a 1+1 configuration, delivering high-efficiency conversion under typical server loads. The Platinum rating reduces waste heat compared with lower tiers, helping the compact 1U airflow path keep component temperatures stable. Fan speed scales with inlet temperature and power draw, so acoustic output rises only when the system is under sustained pressure. No liquid cooling or oversized heatsinks are included in the barebone.

Hot-swap storage and single GPU slot

Four front hot-swap bays accept two 2.5-inch NVMe drives on PCIe 4.0 x4 and two 3.5-inch SATA drives, enabling drive changes without downtime. Two internal M.2 sockets add one PCIe 5.0 x4 and one PCIe 4.0 x4 slot for boot or cache devices. A single full-height half-length PCIe 4.0 x16 slot accommodates one accelerator or network card. Dual Intel i210 1 GbE ports, a VGA output from the ASPEED AST2600 BMC, DisplayPort, HDMI and rear USB complete the I/O. Buyers who need more than one GPU or additional PCIe lanes should look elsewhere.