ASUS RS521A-E12-RS24U 2U Server: Supports 1x AMD EPYC 9005 CPU, 24x DDR5 DIMMs (Up to 3TB), 24x Front NVMe, 2x Rear SATA, 2x M.2, 5x PCIe 5.0 Slots, and OCP 3.0

ASUS RS521A-E12-RS24U: 2U Single-Socket Server with AMD EPYC 9005 Processor and 24 NVMe

Product Overview

The ASUS RS521A-E12-RS24U is a high-performance 2U single-socket rack server designed for modern data centers, software-defined storage, virtualization, and data-intensive business-critical workloads . Powered by AMD EPYC 9005 Series processors, this server delivers exceptional computing power while offering massive storage scalability with up to 24 all-flash NVMe drives on the front panel . The 2U form factor enables high-density deployment while maintaining enterprise-grade reliability and scalability for AI, HPC, virtualization, and database applications.

Built on the AMD SP5 platform, the RS521A-E12-RS24U supports the latest 5th Gen EPYC processors with up to 192 Zen 5c cores, making it an ideal choice for compute-intensive operations and demanding enterprise environments .

Key Performance Capabilities

Next-Generation AMD EPYC 9005 Processor Architecture

The RS521A-E12-RS24U harnesses the power of AMD's latest processor technology:

• Single AMD EPYC 9005 Series processor (SP5 socket, LGA 6096) – also compatible with EPYC 9004 Series

• Up to 192 Zen 5c cores for exceptional multi-threaded performance

• Max TDP: Up to 360W with EVAC air cooling solution

• 12-channel memory architecture for maximum bandwidth

High-Performance DDR5 Memory

The RS521A-E12-RS24U features an industry-leading memory architecture:

Massive NVMe Storage Configuration

The RS521A-E12-RS24U offers exceptional storage scalability:

PCIe 5.0 Expansion

The RS521A-E12-RS24U provides extensive I/O expansion with PCIe 5.0 architecture (32 GT/s – 2x bandwidth over PCIe 4.0):

GPU Acceleration Support

• Up to 2 dual-slot GPU cards for AI inference and compute acceleration

• Supported GPUs: NVIDIA A100, A40; AMD Instinct; Xilinx Alveo accelerators

Networking

I/O Ports

Graphics and Management

• Integrated Graphics: ASPEED AST2600 with 64MB VRAM

• Remote Management: ASUS ASMB11-iKVM (BMC) for KVM-over-IP

• Management Software: ASUS Control Center (in-band management)

• Security: Hardware-level Root-of-Trust solution

• Redfish API Support: For automated data center management

Cooling and Power

The RS521A-E12-RS24U is engineered for continuous operation with optimized thermal management:

• Cooling: Air cooling solution with heatsink; achieves lower PUE and optimized TCO

• Fans: 4 x 80x56mm case fans

• Power Supplies: 1+1 redundant hot-swap PSUs

• Power Options: 1600W or 2000W 80 PLUS Titanium

• Redundancy: Complete power supply redundancy for high-availability deployments

• Power Efficiency: Lower PUE and optimized TCO for data centers

Physical Specifications

Operating Environment

Enterprise-Grade Management & Security

ASUS ASMB11-iKVM

The RS521A-E12-RS24U features the ASMB11-iKVM module powered by ASPEED AST2600, providing comprehensive out-of-band remote management :

• KVM-over-IP: Full remote control regardless of OS state

• Virtual Media: Remote mounting of ISO images

• Redfish API Support: For automated data center management

• Dedicated Management LAN: Isolated management network

ASUS Control Center

Centralized management software for multiple servers, offering :

• Real-time hardware monitoring

• Remote BIOS configuration

• Proactive alerting and fault detection

• Simplified maintenance and deployment

Security Features

The RS521A-E12-RS24U provides comprehensive security capabilities:

• Root-of-Trust: Hardware-level security foundation

• TPM Module: Optional Trusted Platform Module

• PFR Module: Optional Platform Firmware Resilience

OS Support

The server supports a wide range of operating systems :

• Red Hat Enterprise Linux

• SUSE Linux Enterprise Server

• Ubuntu (certified with Ubuntu 24.04 LTS)

• CentOS

• VMware

• Windows (with appropriate drivers)

Detailed Technical Specifications

Key Applications

High-Performance Computing (HPC)

The 12-channel DDR5 memory architecture (up to 5200MHz) and PCIe 5.0 expansion enable high-bandwidth data movement for scientific simulations, genomic research, and computational chemistry workloads. Support for up to 192 cores delivers exceptional parallel processing capability.

AI Inference and Machine Learning

Support for up to two dual-slot GPUs combined with EPYC 9005's 192 cores makes this server ideal for AI inference workloads at the edge or in data centers. The PCIe 5.0 slots provide ample bandwidth for GPU accelerators including NVIDIA A100 and AMD Instinct .

Software-Defined Storage (SDS) and All-Flash Arrays

With up to 24 front NVMe drives, the RS521A-E12-RS24U delivers exceptional I/O performance for data-intensive applications. The flexible storage architecture supports all-flash NVMe configurations for maximum throughput, making it ideal for SDS, content delivery networks (CDN), video streaming, and media processing .

Virtualization and Cloud Infrastructure

With 24 DDR5 DIMM slots supporting up to 3TB of memory and up to 192 cores, the RS521A-E12-RS24U delivers exceptional virtual machine density for private and public cloud deployments. The single-socket design reduces software licensing costs while maintaining high performance .

Database Management and Data Warehousing

The combination of high core count, large memory capacity (3TB), high-speed memory (5200MHz), and high-speed NVMe storage enables in-memory database deployments and high-performance transaction processing systems for terabyte-scale data warehouse applications .

Why Choose ASUS RS521A-E12-RS24U?

Conclusion

The ASUS RS521A-E12-RS24U represents a significant advancement in 2U single-socket server design, combining AMD EPYC 9005 processors (up to 192 cores) with 24 DDR5 DIMM slots (up to 3TB at 5200MHz), industry-leading storage density (up to 24 NVMe drives), PCIe 5.0 expansion (5 slots + OCP 3.0), and flexible networking options in a compact 2U form factor .

With support for up to two dual-slot GPUs, enterprise-grade management (ASMB11-iKVM with AST2600), hardware-level Root-of-Trust security, and 1+1 redundant Titanium power supplies, this server delivers exceptional performance, reliability, and efficiency for HPC, AI inference, storage-intensive applications, virtualization, database management, and software-defined storage workloads .

Backed by ASUS's comprehensive management suite (ASUS Control Center, Redfish API), ENERGY STAR certification, and scalable all-flash NVMe storage architecture, the RS521A-E12-RS24U is the ideal choice for organizations seeking a powerful, cost-effective, and future-proof 2U server platform for modern data center and enterprise environments .