AMD EPYC 9555P
- Brand:
- AMD
- Form Factor:
- Server & Enthusiast
- CPU Socket:
- SP5
- Core/Thread Count:
- 64C/128T
- TDP:
- 360W
- CPU Series:
- EPYC 9005 Series
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Manufacturer: AMD Last updated: October 9, 2026
AMD EPYC 9555P Review
AMD EPYC 9555P server processor, 64C/128T 3.2 GHz base clock, boosting up to 4.4 ghz, 360W TDP, SP5 platform.
The AMD EPYC 9555P is an AMD EPYC server processor in the EPYC 9005 Series lineup, offering 64C/128T running at 3.2 GHz base clock, boosting up to 4.4 ghz with 256 MB of L3 cache, within a 360W power envelope on AMD's SP5 platform in 1P configurations.
Performance and Architecture
With 64C/128T, the AMD EPYC 9555P runs at 3.2 GHz base clock, boosting up to 4.4 ghz. It carries 256 MB of L3 cache to keep large working sets close to the cores. As part of AMD's EPYC server lineup, it targets dense multi-socket compute, virtualization, and datacenter workloads.
Platform and Memory
The AMD EPYC 9555P is built for AMD's SP5 platform, supporting 1P socket configurations. It supports DDR5 memory across 12 channels (Up to 6400 MT/s). I/O runs over PCIe 5.0 x128.
Comparison to Alternatives
Within the EPYC 9005 Series lineup in this catalog, the AMD EPYC 9555P is positioned by its core count, clock speed, and TDP relative to other EPYC parts in the same generation. Buyers should weigh core density against per-core clock speed depending on whether the target workload favors many parallel threads or fewer, faster ones.
Our verdict
Reviewed by Burooj Alam. Rated by us, not by users.
Best for
- Datacenter and cloud compute
- Virtualization-dense server workloads
- Multi-socket enterprise deployments
Not for
- Consumer desktop builds
- Single-threaded latency-sensitive workloads on lower core-count SKUs
- Budget-constrained small business servers
Specifications
What these specs meanIdentity
| Release Year | 2024 |
|---|
Cores and threads
| Core Count | 64 cores |
|---|---|
| Thread Count | 128 threads |
Clocks
| Base Clock | 3.2 GHz |
|---|---|
| Boost Clock | Up to 4.4 GHz |
| All-Core Boost | 4.2 GHz |
Cache
| L3 Cache | 256 MB |
|---|
Platform
| Socket | SP5 |
|---|---|
| Multi-Socket Support | 1P |
Memory
| Memory Channels | 12 channels |
|---|---|
| Max Memory Speed | 6400 MT/s |
| Memory Bandwidth | 614 GB/s |
PCIe and IO
| PCIe Lanes | 128 lanes |
|---|---|
| PCIe Generation | PCIe 5.0 |
Power and thermals
| TDP | 360 W |
|---|---|
| Configurable TDP Max | 320-400W |
Measured results
SPEC CPU 2017
Best published result on spec.org as of 23 Sept 2026.
| SPECrate® 2017 Integer (base) | 864 |
Cores 64 · Tested in H3C UniServer R3750 G7 (AMD EPYC 9555P) · Published by New H3C Technologies Co., Ltd., Apr-2026
Full disclosure on spec.org| SPECrate® 2017 Floating Point (base) | 891 |
Cores 64 · Tested in H3C UniServer R3750 G7 (AMD EPYC 9555P) · Published by New H3C Technologies Co., Ltd., Apr-2026
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 9555P?
The AMD EPYC 9555P has 64 cores and 128 threads, a 3.2 GHz base and 4.4 GHz boost clock, 256 MB of L3 cache and a 360 W TDP.
Who is the AMD EPYC 9555P best suited to?
Best suited to: Datacenter and cloud compute; Virtualization-dense server workloads; Multi-socket enterprise deployments.
What are the drawbacks of the AMD EPYC 9555P?
Not the best fit for: Consumer desktop builds; Single-threaded latency-sensitive workloads on lower core-count SKUs; Budget-constrained small business servers.