Processor AMD EPYC 9455 3.15 GHz 256 MB L3 Socket SP5

The AMD EPYC 9455 is a server processor from the 5th Gen EPYC 9005 family, operating at a base frequency of 3.15 GHz with up to 4.4 GHz boost and 48 cores. It provides 256 MB of L3 cache, dodeca-channel DDR5 memory support and high memory bandwidth, and uses the Socket SP5 platform. Designed for data center, cloud and AI workloads, this CPU aims to deliver high core density, memory capacity and energy-efficient performance for demanding server applications.

Advantages

The EPYC 9455 offers high integer and AI inference performance on CPU-only and GPU-host systems, enabling up to industry-leading per-server throughput while reducing rack count, power consumption and total cost of ownership. With Zen 5 core architecture and AMD chiplet design it combines core density (48 cores), large L3 cache (256 MB) and wide DDR5 memory bandwidth to support virtualization, high-concurrency cloud services and AI workloads. The Socket SP5 compatibility ensures integration with modern server platforms.

Suitable for

• Cloud virtualisation and high-density vCPU deployments
• CPU-based AI inference for medium-size language and vision models
• GPU-accelerated AI servers as a high-performance host CPU
• Enterprise databases, analytics and multi-tenant server environments

Key specifications

• Model: AMD EPYC 9455
• Architecture: 5th Gen EPYC (Zen 5 / Zen 5c family)
• Cores / Threads: 48 cores
• Base frequency: 3.15 GHz
• Boost frequency: up to 4.4 GHz
• L3 cache: 256 MB
• Memory: dodeca-channel DDR5-SDRAM support; maximum memory bandwidth up to 576 GB/s (family reference)
• Socket: SP5
• On-board graphics: not available

How to use

Install the EPYC 9455 into a compatible Socket SP5 server motherboard following the server manufacturer's installation and thermal guidelines. Configure appropriate cooling and power delivery for data center operation. Populate DDR5 memory modules according to the motherboard's dodeca-channel layout to achieve optimal memory bandwidth. For GPU-accelerated deployments, pair the processor with supported PCIe GPUs and verify BIOS/firmware settings to enable full PCIe lanes and platform features.

Recommendations

For optimal results in cloud and AI environments, deploy the EPYC 9455 in systems with adequate cooling and power headroom, use certified server BIOS and drivers, and size virtual CPU and memory allocations to match workload concurrency. When used as a GPU host CPU, choose server platforms that expose required PCIe lanes and verify interoperability with selected GPU models.