AMD Ryzen Threadripper 3990X
- iGPU:
- None (CPU only)
- Boost/Base Clock:
- 4.3 GHz / 2.9 GHz
- Core/Thread Count:
- 64 Core / 128 Thread
- Cache:
- 256MB L3 + 32MB L2 + 4MB L1
- TDP:
- 280 Watts
- CPU Process Node:
- 7 Nanometers (TSMC)
- CPU Socket:
- sTRX4
- CPU Series:
- Zen 2, Ryzen Threadripper 3000 Series
- Memory Support:
- DDR4-3200, ECC supported (unbuffered)
- Form Factor:
- Server & Enthusiast
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Manufacturer: AMD Last updated: September 9, 2026
AMD Ryzen Threadripper 3990X Review
The AMD Ryzen Threadripper 3990X is a 64-core, 128-thread high-end desktop processor built on Zen 2, designed for workstation and enthusiast use, running a 2.9 GHz base clock that boosts to 4.3 GHz within a 280 Watt TDP.
Blurring the line between consumer and enterprise hardware, this chip's core count directly rivals server-class AMD EPYC processors, and at the time of launch faced essentially no real competition from Intel at this specific core count and price tier.
Integrated Graphics
This chip ships without a functional integrated GPU; a discrete graphics card is required, consistent with AMD's entire high-end desktop and workstation Threadripper lineup.
How Is the Ryzen Threadripper 3990X in Terms of Performance
With 64 cores and 128 threads, this chip is built exclusively for the most extreme parallel workloads: video rendering farms, scientific computing, and massive compilation jobs, rather than any typical desktop use case, gaming included, where the core count goes largely unused.
Benchmarks
Cinebench R23 multi-core scores of 74,386 dwarf virtually every consumer desktop chip of its era, a direct reflection of the 64-core count.
Our verdict
Reviewed by Burooj Alam. Rated by us, not by users.
Best for
- Extreme parallel workloads: video rendering farms, scientific computing, massive compilation jobs
Not for
- Gaming or typical desktop use, the 64-core count goes largely unused, and a mainstream gaming CPU delivers better single-core responsiveness for far less money
Specifications
What these specs meanIdentity
| Brand | AMD |
|---|---|
| Model Number | 3990X |
| Product Family | Ryzen Threadripper |
Cores and threads
| Core Count | 64 cores |
|---|---|
| Thread Count | 128 threads |
Clocks
| Base Clock | 2.9 GHz |
|---|---|
| Boost Clock | 4.3 GHz |
Cache
| L2 Cache | 32 MB |
|---|---|
| L3 Cache | 256 MB |
Platform
| Socket | sTRX4 |
|---|
Memory
| Max Memory Speed | 3200 MT/s |
|---|---|
| ECC Support | Yes |
Power and thermals
| TDP | 280 W |
|---|
Manufacturing
| Process Node | 7 Nanometers (TSMC) |
|---|
| iGPU | None (CPU only) |
|---|
FAQs
What are the key specifications of the AMD Ryzen Threadripper 3990X?
The AMD Ryzen Threadripper 3990X has a 2.9 GHz base and 4.3 GHz boost clock, 256 MB of L3 cache and a 280 W TDP. It has no integrated graphics, so it needs a graphics card. Socket: sTRX4.
Will the AMD Ryzen Threadripper 3990X work with my current setup?
The AMD Ryzen Threadripper 3990X lists CPU Socket is sTRX4. 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 Ryzen Threadripper 3990X best suited to?
Best suited to: Extreme parallel workloads: video rendering farms, scientific computing, massive compilation jobs.
What are the drawbacks of the AMD Ryzen Threadripper 3990X?
Not the best fit for: Gaming or typical desktop use, the 64-core count goes largely unused, and a mainstream gaming CPU delivers better single-core responsiveness for far less money.