AMD EPYC 9355P
Expert rating8.5 / 10
- Brand:
- AMD
- Form Factor:
- Server & Enthusiast
- CPU Socket:
- SP5
- Core/Thread Count:
- 32C/64T
- TDP:
- 280W
- iGPU:
- None
- CPU Series:
- EPYC
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Manufacturer: AMD Last updated: 2026-09-11
AMD EPYC 9355P Review
AMD EPYC 9355P 32-core 64-thread SP5 server processor, 3.55GHz base / 4.4GHz boost, 280W TDP, 256MB L3 cache, Zen 5 "Turin"
The EPYC 9355P is a single-socket-optimized EPYC processor priced for servers that will never need a second CPU socket. Built on Zen 5 "Turin" and rated for 280W, it pairs 32 cores and 64 threads with a 3.55GHz base clock that boosts up to 4.4GHz, backed by 256MB of L3 cache on AMD's SP5 server platform.
Core Count and Workload Fit
With 32 cores and 64 threads, the EPYC 9355P is built for data center workloads that scale across many cores: virtualization hosts, container orchestration, databases, and web-tier fleets. Base clock of 3.55GHz with boost to 4.4GHz means per-thread performance trails the higher-clocked EPYC SKUs somewhat, trading it for core density. The 256MB L3 cache keeps per-core cache allocation reasonable for the socket.
Platform, Memory, and Cooling
The EPYC 9355P runs on AMD's SP5 platform with 12-channel DDR5 memory support and up to 128 PCIe 5.0 lanes per socket, giving it enormous memory bandwidth and I/O headroom for NVMe storage arrays and high-speed networking. As a single-socket-optimized SKU, it is priced and validated specifically for 1P servers rather than 2P deployments. At 280W, it requires server-grade cooling: high-static-pressure fans and a chassis designed for sustained data-center airflow, not a repurposed desktop tower.
Comparison to Alternatives
Compared to the higher core-count EPYC SKUs in this catalog like the EPYC 9454 or EPYC 9554, the EPYC 9355P is the more affordable and lower-power entry point into the EPYC server lineup, suited to smaller deployments. Against a Ryzen 9 desktop chip, it adds ECC memory, 12-channel bandwidth, and genuine server-grade reliability features that a desktop platform simply doesn't offer. It undercuts equivalent-tier Intel Xeon Scalable parts in this catalog on memory channel count.
Our verdict
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating8.5 / 10
The EPYC 9355P is a smart cost-saver for any deployment that was only ever going to use one socket.
Best for
- Single-socket server deployments
- Cost-conscious data center builds
- Mid-size virtualization hosts
Not for
- Dual-socket server designs
- Maximum core density needs
- Future socket-count flexibility
Specifications
What these specs meanCores and threads
| Core Count | 32 cores |
|---|---|
| Thread Count | 64 threads |
| Core Architecture | Zen 5 "Turin" |
Clocks
| Base Clock | 3.55 GHz |
|---|---|
| Boost Clock | 4.4 GHz |
Cache
| L3 Cache | 256 MB |
|---|
Platform
| Socket | SP5 |
|---|---|
| Multi-Socket Support | 1P (single-socket optimized) |
Memory
| Memory Channels | 12 channels |
|---|---|
| ECC Support | Yes |
Power and thermals
| TDP | 280 W |
|---|
Measured results
SPEC CPU 2017
Best published result on spec.org as of 23 Sept 2026.
| SPECrate® 2017 Integer (base) | 490 |
Cores 32 · Tested in H3C UniServer R3950 G7 (AMD EPYC 9355P) AMD EPYC 9355P · Published by New H3C Technologies Co., Ltd., Jan-2025
Full disclosure on spec.org| SPECrate® 2017 Floating Point (base) | 667 |
Cores 32 · Tested in H3C UniServer R3950 G7 (AMD EPYC 9355P) AMD EPYC 9355P · Published by New H3C Technologies Co., Ltd., Jan-2025
Full disclosure on spec.orgSPEC®, SPECrate® and SPECspeed® are registered trademarks of the Standard Performance Evaluation Corporation. Copied by permission of the Standard Performance Evaluation Corporation (SPEC). Results retrieved from www.spec.org on 23 Sept 2026.
FAQs
What are the key specifications of the AMD EPYC 9355P?
The AMD EPYC 9355P has 32 cores and 64 threads, a 3.55 GHz base and 4.4 GHz boost clock, 256 MB of L3 cache and a 280 W TDP. Socket: SP5.
Will the AMD EPYC 9355P work with my current setup?
The AMD EPYC 9355P lists Socket is SP5. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.
Who is the AMD EPYC 9355P best suited to?
Best suited to: Single-socket server deployments; Cost-conscious data center builds; Mid-size virtualization hosts.
What are the drawbacks of the AMD EPYC 9355P?
Not the best fit for: Dual-socket server designs; Maximum core density needs; Future socket-count flexibility.