AMD EPYC 9755
Expert rating9.4 / 10
- Brand:
- AMD
- Form Factor:
- Server & Enthusiast
- CPU Socket:
- SP5
- Core/Thread Count:
- 128C/256T
- TDP:
- 500W
- iGPU:
- None
- CPU Series:
- EPYC
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Manufacturer: AMD Last updated: 2026-09-11
AMD EPYC 9755 Review
AMD EPYC 9755 128-core 256-thread SP5 server processor, 2.7GHz base / 4.5GHz boost, 500W TDP, 384MB L3 cache, Zen 5 "Turin"
The EPYC 9755 is AMD's flagship standard-core EPYC processor, combining 128 Zen 5 cores with clocks that stay competitive with far lower core-count SKUs. Rated for 500W, it delivers a 2.7GHz base clock boosting to 4.5GHz alongside 384MB of L3 cache on AMD's SP5 platform.
Core Count and Workload Fit
With 128 full-size Zen 5 cores and 256 threads, the EPYC 9755 is built for workloads that need both massive parallelism and strong per-thread performance: large-scale databases, HPC, and heavily virtualized environments running demanding VMs. Its 2.7GHz base and 4.5GHz boost clock are unusually high for a 128-core part, at the cost of a 500W power envelope.
Platform, Memory, and Cooling
The EPYC 9755 runs on AMD's SP5 platform with 12-channel DDR5 memory support and up to 128 PCIe 5.0 lanes per socket. It supports both single-socket (1P) and dual-socket (2P) deployments. At 500W, it is among the most power-hungry EPYC SKUs and requires the most capable server cooling and power delivery available on the platform.
Comparison to Alternatives
Against the dense Zen 5c EPYC 9745 in this catalog at the same 128-core count, the EPYC 9755 trades a 100W higher power budget for meaningfully higher clocks on every core. Compared to the Threadripper PRO 9995WX in this catalog, it adds genuine dual-socket scalability and far greater memory bandwidth. It represents AMD's answer to Intel's highest-clocked, highest core-count Xeon Scalable flagships.
Specifications
Identity
| Brand | AMD |
|---|---|
| Model Number | 9755 |
| Product Family | EPYC Turin |
| Release Year | 2024 |
| Segment | Data Center |
Cores and threads
| Core Count | 128 cores |
|---|---|
| Thread Count | 256 threads |
| Core Architecture | Zen 5 |
| SMT Support | Yes |
Clocks
| Base Clock | 2.7 GHz |
|---|---|
| Boost Clock | 4.5 GHz |
Cache
| L3 Cache | 384 MB |
|---|---|
| 3D V-Cache | No |
Platform
| Socket | SP5 |
|---|---|
| Multi-Socket Support | Dual Socket |
Memory
| Memory Channels | 12 channels |
|---|---|
| Memory Type | DDR5 RDIMM |
| Max Memory Speed | 6400 MT/s |
| Max Memory Capacity | 6 TB |
| ECC Support | Yes |
| Registered Memory Required | Yes |
PCIe and IO
| PCIe Lanes | 128 lanes |
|---|---|
| PCIe Generation | PCIe 5.0 |
| CXL Support | CXL 2.0 |
Power and thermals
| TDP | 500 W |
|---|---|
| Cooler Included | No |
| Cooling Requirement | Passive Rack |
Accelerators and security
| Integrated Graphics | No |
|---|---|
| AVX-512 Support | Yes |
| AMX Support | No |
| Memory Encryption | AMD SEV-SNP |
Manufacturing
| Process Node | TSMC 3nm |
|---|---|
| Chiplet Design | Yes |
| CCD Count | 8 dies |
Commercial
| Warranty | 3 years |
|---|
| Form Factor | Server & Enthusiast |
|---|---|
| Cores | 128 |
| Threads | 256 |
| Memory Support | 12-channel ECC DDR5 |
| Architecture | Zen 5 "Turin" |
| Socket Configuration | 1P/2P |
Measured results
SPEC CPU 2017
Best published result on spec.org as of 23 Sept 2026.
| SPECrate® 2017 Integer (base) | 1,410 |
Cores 128 · Tested in ASUS RS520QA-E13-RS8U (2.70 GHz, AMD EPYC 9755) · Published by ASUSTeK Computer Inc., Oct-2025
Full disclosure on spec.org| SPECrate® 2017 Floating Point (base) | 1,220 |
Cores 128 · Tested in ASUS RS520QA-E13-RS8U (2.70 GHz, AMD EPYC 9755) · Published by ASUSTeK Computer Inc., Oct-2025
Full disclosure on spec.org| SPECrate® 2017 Integer (base) | 2,850 |
Cores 256 · Tested in ASUS RS720A-E13-RS8U (2.70 GHz, AMD EPYC 9755) · Published by ASUSTeK Computer Inc., Mar-2026
Full disclosure on spec.org| SPECrate® 2017 Floating Point (base) | 2,490 |
Cores 256 · Tested in ASUS RS720A-E13-RS8U (2.70 GHz, AMD EPYC 9755) · Published by ASUSTeK Computer Inc., Mar-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.
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating9.4 / 10
The EPYC 9755 is AMD's most powerful standard-core EPYC SKU, pairing 128 cores with clocks that make few compromises for organizations that can afford the 500W power budget.
Best for
- Large-scale enterprise databases
- HPC and technical computing at scale
- Maximum-performance virtualization hosts
Not for
- Power-constrained deployments
- Small server rooms
- Cost-sensitive builds
FAQs
What are the key specifications of the AMD EPYC 9755?
The AMD EPYC 9755 is a server CPU from AMD. Key specs: Cores 128, Threads 256, Base Clock 2.7 GHz, Boost Clock 4.5 GHz, L3 Cache 384.
Will the AMD EPYC 9755 work with my current setup?
The AMD EPYC 9755 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 9755 best suited to?
It suits large-scale enterprise databases, hpc and technical computing at scale, maximum-performance virtualization hosts.
What are the drawbacks of the AMD EPYC 9755?
It is a poor fit for power-constrained deployments, small server rooms, cost-sensitive builds.