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AMD Ryzen Threadripper 3990X
The Ryzen Threadripper 3990X is the top model of AMD's Zen 2 Threadripper 3000 series for the sTRX4 socket, with 64 cores, 128 threads, a 2.9 GHz base clock, up to 4.3 GHz boost and 256 MB of L3 cache. It has a 280 W TDP and quad-channel DDR4 memory support up to 256 GB.
Pros
- 64 cores and 128 threads with up to 4.3 GHz boost clock
- 256 MB of L3 cache and 32 MB of L2 cache
- Quad-channel DDR4-3200 memory support, up to 256 GB
- 64 PCIe 4.0 lanes from the CPU (56 usable for devices) for GPUs and NVMe storage
- Unlocked multiplier for overclocking
Cons
- 280 W TDP; no cooler in the box and AMD recommends liquid cooling
- No integrated graphics, so a discrete graphics card is required
- Requires the sTRX4 socket and TRX40 motherboards, which are not compatible with earlier Threadripper processors
- $3,990 launch price, before a TRX40 board and a large memory kit
Very good
Computed from specs & benchmarks via our public methodology.
Full specifications
Everything we track for the AMD Ryzen Threadripper 3990X
General
- Announced
- 2020
- Socket
- sTRX4
- Process
- 7 nm
- Base TDP
- 280 W
- Unlocked multiplier
- Yes
- Cooler included
- No
Cores & Clocks
- Cores
- 64
- Performance cores
- 64
- Efficiency cores
- 0
- Threads
- 128
- Base clock
- 2.9 GHz
- Boost clock
- 4.3 GHz
- L2 cache
- 32 MB
- L3 cache
- 256 MB
Memory
- Memory support
- DDR4-3200
- Max memory
- 256 GB
- Memory channels
- 4
Platform
- PCIe version
- 4
- CPU PCIe lanes
- 64
Benchmarks
- PassMark
- 79,592Top 2%
- PassMark (single thread)
- 2,561Bottom 22%
Quick answers
Is the AMD Ryzen Threadripper 3990X good in 2026?
The AMD Ryzen Threadripper 3990X earns an Inno Score of 76.8/100 (“Very good”) based on its specs and benchmark results. The Ryzen Threadripper 3990X is the top model of AMD's Zen 2 Threadripper 3000 series for the sTRX4 socket, with 64 cores, 128 threads, a 2.9 GHz base clock, up to 4.3 GHz boost and 256 MB of L3 cache. It has a 280 W TDP and quad-channel DDR4 memory support up to 256 GB.
What are the key specs of the AMD Ryzen Threadripper 3990X?
Cores: 64 · Threads: 128 · Boost clock: 4.3 GHz · Socket: sTRX4
What are the closest alternatives to the AMD Ryzen Threadripper 3990X?
Its closest rivals on InnoReviews are Intel Core Ultra 7 265F, Intel Core i9-14900, Intel Core i9-14900F — open the comparison pages for a spec-by-spec breakdown.
