AMD EPYC 9745
Expert rating9.1 / 10
- Brand:
- AMD
- Form Factor:
- Server & Enthusiast
- CPU Socket:
- SP5
- Core/Thread Count:
- 128C/256T
- TDP:
- 400W
- iGPU:
- None
- CPU Series:
- EPYC
Consumercarts is reader-supported. Learn more
Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.
Manufacturer: AMD Last updated: 2026-09-11
AMD EPYC 9745 Review
AMD EPYC 9745 128-core 256-thread SP5 server processor, 2.4GHz base / 4.0GHz boost, 400W TDP, 384MB L3 cache, Zen 5c "Turin Dense"
The EPYC 9745 is a 128-core dense Zen 5c server processor built for cloud providers packing as many VMs or containers per socket as possible at a moderate 400W envelope. It pairs 128 cores and 256 threads with a 2.4GHz base clock that boosts up to 4.0GHz, backed by 384MB of L3 cache on AMD's SP5 platform.
Core Count and Workload Fit
With 128 cores and 256 threads, the EPYC 9745 is built for hyperscale virtualization density: container orchestration platforms, VM-dense cloud hosting, and horizontally scaled web tiers. Its 2.4GHz base clock and 4.0GHz boost trail AMD's standard-core SKUs, a deliberate tradeoff for cramming this many dense cores into one socket at a manageable 400W.
Platform, Memory, and Cooling
The EPYC 9745 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 aggregate memory bandwidth relative to its per-core share. It supports both single-socket (1P) and dual-socket (2P) deployments. At 400W, it demands server-grade, high-static-pressure cooling.
Comparison to Alternatives
Against the Threadripper PRO 9995WX in this catalog, the EPYC 9745 trades single-socket workstation convenience for true dual-socket scalability and 12-channel ECC memory. Compared to the standard-core EPYC 9755 in this catalog at the same 128-core count, it runs cooler at 400W versus 500W by using the denser Zen 5c core. It competes directly with Intel's highest core-count Xeon Scalable parts in this catalog for hyperscale virtualization density.
Our verdict
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating9.1 / 10
The EPYC 9745 delivers 128-core density at a more power-conscious 400W, making it the efficiency-minded pick for hyperscale deployments.
Best for
- Hyperscale cloud and VM hosting
- Container-dense Kubernetes nodes
- Power-conscious high-density deployments
Not for
- Small server deployments
- Per-core licensed software
- Latency-sensitive single-threaded workloads
Specifications
What these specs meanCores and threads
| Core Count | 128 cores |
|---|---|
| Thread Count | 256 threads |
| Core Architecture | Zen 5c "Turin Dense" |
Clocks
| Base Clock | 2.4 GHz |
|---|---|
| Boost Clock | 4.0 GHz |
Cache
| L3 Cache | 384 MB |
|---|
Platform
| Socket | SP5 |
|---|---|
| Multi-Socket Support | 1P/2P |
Memory
| Memory Channels | 12 channels |
|---|---|
| ECC Support | Yes |
Power and thermals
| TDP | 400 W |
|---|
Measured results
SPEC CPU 2017
Best published result on spec.org as of 23 Sept 2026.
| SPECrate® 2017 Integer (base) | 1,270 |
Cores 128 · Tested in ASUS RS520QA-E13-RS8U (2.40 GHz, AMD EPYC 9745) · Published by ASUSTeK Computer Inc., Dec-2025
Full disclosure on spec.org| SPECrate® 2017 Floating Point (base) | 1,070 |
Cores 128 · Tested in ASUS RS520QA-E13-RS8U (2.40 GHz, AMD EPYC 9745) · Published by ASUSTeK Computer Inc., Dec-2025
Full disclosure on spec.org| SPECrate® 2017 Integer (base) | 2,500 |
Cores 256 · Tested in QR8218-D3 (AMD EPYC 9745) · Published by Maginfra Co., Ltd., Jun-2026
Full disclosure on spec.org| SPECrate® 2017 Floating Point (base) | 2,100 |
Cores 256 · Tested in QR8218-D3 (AMD EPYC 9745) · Published by Maginfra Co., Ltd., Jun-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 9745?
The AMD EPYC 9745 has 128 cores and 256 threads, a 2.4 GHz base and 4.0 GHz boost clock, 384 MB of L3 cache and a 400 W TDP. Socket: SP5.
Will the AMD EPYC 9745 work with my current setup?
The AMD EPYC 9745 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 9745 best suited to?
Best suited to: Hyperscale cloud and VM hosting; Container-dense Kubernetes nodes; Power-conscious high-density deployments.
What are the drawbacks of the AMD EPYC 9745?
Not the best fit for: Small server deployments; Per-core licensed software; Latency-sensitive single-threaded workloads.