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The new ASUS RS501A-E12-RS4U is a single-socket 1U rack server built on AMD's EPYC 9005 series platform — a purpose-built machine for organizations that need serious compute performance without giving up rack space to get it. With 24 DIMM slots of DDR5 memory, 4 hot-swap NVMe-capable bays, and processor options running from 24 cores up to 96, this is a clean, capable 1U platform that ships new and configured exactly to the options you select.
When it comes to the processor, the AMD EPYC 9005 series does a lot of work in a single socket — options on this listing run from the 24-core EPYC 9254 at 2.9GHz through 48-core and 96-core variants, covering everything from general-purpose workloads to high-thread-count compute without requiring a dual-socket chassis or the power budget that comes with one. Memory scales to 2TB across 24 DIMM slots of DDR5 RDIMM at 4800MT/s, which gives memory-intensive applications genuine headroom. On storage, all 4x 2.5" SFF bays are NVMe capable via U.2 PCIe — and the backplane also supports SATA SSDs and SATA HDDs, so you're not locked into a single storage approach.
This is a workhorse platform that thrives in environments like:
- General-purpose enterprise compute — the single-socket EPYC 9005 platform covers a wide range of rack workloads efficiently, with up to 96 cores available without stepping up to a dual-socket chassis.
- Database and in-memory analytics — 24 DIMM slots and up to 2TB of DDR5 memory at 4800MT/s gives databases and analytics engines the low-latency memory access they need to perform.
- Virtualization and containerized environments — high vCPU density and deep memory capacity make this a solid foundation for consolidated VM or container workloads where memory headroom is a real constraint.
- High-thread-count compute and simulation — up to 96 cores in a single 1U chassis keeps the power footprint manageable while still covering CPU-intensive workloads like scientific simulation and data processing.
- Edge data center and colocation deployments — single-socket efficiency and a compact 1U footprint are practical advantages when rack space and power draw carry a real cost.
- Web serving and application hosting — a well-balanced core count, fast DDR5 memory, and 1U density make this a strong fit for application tiers where you want performance without overprovisioning.
Power is handled by a 1+1 redundant pair of 80 PLUS Titanium 1600W PSUs — a high-efficiency, fault-tolerant setup appropriate for always-on production environments. Remote management is covered by the included ASUS ASMB11-iKVM, which provides out-of-band access for console redirection, power control, and system monitoring without requiring physical presence at the rack. Three PCIe Gen5 Add-On card slots and an OCP 3.0 Mezzanine socket give you room to add networking options to match your environment, and 4-post rack rails are included in the box.
The ASUS RS501A-E12-RS4U is new hardware, configured to order and backed by a 90-day warranty. Worth noting: for teams that need a capable, space-efficient EPYC 9005 platform without the cost or complexity of a dual-socket build, this one covers a lot of ground in a single 1U system.
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