AMD Ryzen Threadripper PRO 3945WX
- Brand:
- AMD
- Form Factor:
- Desktop
- Core/Thread Count:
- 12C/24T
- TDP:
- 280W
- iGPU:
- Discrete Graphics Card Required
- CPU Series:
- Ryzen Threadripper PRO 3000 WX-Series
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Manufacturer: AMD Last updated: October 9, 2026
AMD Ryzen Threadripper PRO 3945WX Review
AMD Ryzen Threadripper PRO 3945WX desktop processor, 12C/24T 4 GHz base clock boosting up to 4.3 ghz, 280W TDP.
The AMD Ryzen Threadripper PRO 3945WX is part of AMD's Ryzen Threadripper PRO 3000 WX-Series lineup (Castle Peak), built for desktop systems. It offers 12C/24T with a 4 GHz base clock boosting up to 4.3 ghz, backed by 64 MB of L3 cache, within a 280W TDP, with Discrete Graphics Card Required integrated graphics.
Performance and Architecture
With 12C/24T, the AMD Ryzen Threadripper PRO 3945WX runs at 4 GHz base clock boosting up to 4.3 ghz. Cache totals 6 MB L2 and 64 MB L3. Its Discrete Graphics Card Required integrated graphics handle display output and light graphics work without a discrete GPU.
Platform and Compatibility
It supports DDR4 memory across 8 channels (Up to 3200 MT/s).
Comparison to Alternatives
Within the Ryzen Threadripper PRO 3000 WX-Series lineup in this catalog, the AMD Ryzen Threadripper PRO 3945WX is positioned by its core/thread count and TDP relative to other Ryzen Threadripper PRO parts. Buyers comparing options in this class should weigh core count and clock speed against platform cost and intended workload.
Our verdict
Reviewed by Burooj Alam. Rated by us, not by users.
Best for
- Mainstream desktop builds
- Everyday productivity
- Value-focused upgrades
Not for
- Extreme overclocking (unless K/X-series)
- Workstation-class multi-threaded workloads
- SFF builds without adequate cooling
Specifications
What these specs meanIdentity
| Release Year | 2020 |
|---|
Cores and threads
| Core Count | 12 cores |
|---|---|
| Thread Count | 24 threads |
Clocks
| Base Clock | 4 GHz |
|---|---|
| Boost Clock | Up to 4.3 GHz |
Cache
| L2 Cache | 6 MB |
|---|---|
| L3 Cache | 64 MB |
Memory
| Memory Channels | 8 channels |
|---|---|
| Max Memory Speed | 3200 MT/s |
PCIe and IO
| PCIe Generation | PCIe 4.0 |
|---|
Power and thermals
| TDP | 280 W |
|---|
| iGPU | Discrete Graphics Card Required |
|---|
Measured results
SPEC CPU 2017
Best published result on spec.org as of 23 Sept 2026.
| SPECrate® 2017 Integer (base) | 111 |
Cores 12 · Tested in A+ SuperWorkstation 5014A-TT (M12SWA-TF , AMD Ryzen Threadripper PRO 3945WX) · Published by Supermicro, Apr-2021
Full disclosure on spec.org| SPECrate® 2017 Floating Point (base) | 113 |
Cores 12 · Tested in A+ SuperWorkstation 5014A-TT (M12SWA-TF , AMD Ryzen Threadripper PRO 3945WX) · Published by Supermicro, Apr-2021
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 Ryzen Threadripper PRO 3945WX?
The AMD Ryzen Threadripper PRO 3945WX has 12 cores and 24 threads, a 4 GHz base and 4.3 GHz boost clock, 64 MB of L3 cache and a 280 W TDP. Integrated graphics: Discrete Graphics Card Required.
Who is the AMD Ryzen Threadripper PRO 3945WX best suited to?
Best suited to: Mainstream desktop builds; Everyday productivity; Value-focused upgrades.
What are the drawbacks of the AMD Ryzen Threadripper PRO 3945WX?
Not the best fit for: Extreme overclocking (unless K/X-series); Workstation-class multi-threaded workloads; SFF builds without adequate cooling.