Description
The ASUS RS521A-E12-RS12U-20TW1G Rackmount Server delivers exceptional performance, scalability, and reliability for data-intensive workloads and enterprise computing environments. Designed around the latest AMD EPYC 9005 / 9004 Series processors, it combines high-speed DDR5 memory, PCIe 5.0 expansion, and 2U rack-optimized architecture to accelerate demanding business applications and AI workloads.
With twelve front 3.5-inch hot-swappable drive bays and two rear 2.5-inch bays, the RS521A-E12-RS12U offers flexible storage expansion. It supports up to 2TB of DDR5-5200 memory across 24 DIMM slots, ensuring outstanding responsiveness for virtualization, analytics, and cloud deployment.
Expansion is seamless through four PCIe 5.0 x16 slots (for GPUs or accelerators) and one PCIe 5.0 x8 slot, plus an OCP 3.0 slot for high-speed network adapters. Dual Gigabit RJ45 Ethernet ports deliver robust connectivity, while redundant 2000W 80 PLUS Titanium power supplies ensure high efficiency and uptime reliability for mission-critical operations.
Built with ASUS’s engineering excellence, the RS521A-E12-RS12U-20TW1G is ideal for enterprises seeking a powerful, future-ready server platform that adapts to evolving workloads.
| Category | Details |
|---|---|
| System Type | Rackmount Server (Barebone) |
| Form Factor | 2U |
| Processor Support | Single AMD EPYC 9005 / 9004 Series |
| CPU Socket | SP5 (LGA 6096) |
| Chipset | AMD EPYC Platform |
| Memory Slots | 24 x DDR5 RDIMM Slots |
| Memory Type / Speed | DDR5 4800 / 5200 MT/s |
| Max Memory Capacity | Up to 2TB |
| Drive Bays | 12 x 3.5" (Front) / 2 x 2.5" (Rear) |
| M.2 Slots | 2 x M.2 22110 (PCIe 5.0 x4 / SATA III) |
| RAID Support | Yes |
| Expansion Slots | 4 x PCIe 5.0 x16, 1 x PCIe 5.0 x8, 1 x PCIe 5.0 x16 (OCP 3.0) |
| Networking | 2 x Gigabit RJ45 Ethernet |
| USB Ports | 4 x USB-A 3.2 Gen 1 |
| Video Output | 1 x VGA |
| Audio | None |
| Operating System Support | Windows Server 2022, Ubuntu 24.2 |
| Cooling | 4 x System Fans |
| Power Supply | 1+1 Redundant 2000W 80 PLUS Titanium |
| Input Voltage | 100–240V AC, 50/60 Hz |
| Operating Temperature | 10°C – 35°C (50°F – 95°F) |
| Storage Temperature | -40°C – 70°C (-40°F – 158°F) |
| Humidity Range | 20% – 90% (non-condensing) |
| Dimensions (W x D x H) | 17.7 x 33.1 x 3.5 in (449 x 840 x 88.1 mm) |
| Weight | 40 lb / 18.1 kg |
| Included Accessories | 2 x Power Cables, CPU Heatsink |
| Warranty | 3-Year Manufacturer Warranty |
Payment & Security
Your payment information is processed securely, and we do not store credit card details or access your credit card information.
Return Policy (Short Summary)
We offer a 30-day return window for most unopened, factory-sealed items.
Returns must be authorized before shipping back and must include all original packaging and accessories. Opened or used items are not returnable unless defective.
Some products—such as custom orders, special-order items, audio gear, software, and LED video walls—are non-returnable. Non-defective returns may be subject to a 20–30% restocking fee, and customers are responsible for return shipping costs.
For damaged or incorrect items, please contact us immediately.
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