AMD
AMD Ryzen 9 3900
AMD's Ryzen 9 3900 is an OEM-only Zen 2 (Matisse) desktop processor for socket AM4 with 12 cores, 24 threads, a 3.1 GHz base and up to 4.3 GHz boost clock, and 64 MB of L3 cache. It runs at a 65 W default TDP, supports PCIe 4.0 and has no integrated graphics.
Pros
- 12 cores / 24 threads with 64 MB of L3 cache
- 65 W default TDP, lower than the 105 W Ryzen 9 3900X
- Unlocked multiplier for overclocking
- PCIe 4.0 and dual-channel DDR4 up to 3200 MT/s
- Built on TSMC 7 nm FinFET
Cons
- Sold to OEMs only, not as a retail boxed processor
- No integrated graphics, so a discrete card is required
- 3.1 GHz base clock is well below the 3900X
- No official US retail price
Average
Computed from specs & benchmarks via our public methodology.
Full specifications
Everything we track for the AMD Ryzen 9 3900
General
- Announced
- 2019
- Socket
- AM4
- Process
- 7 nm
- Base TDP
- 65 W
- Unlocked multiplier
- Yes
Cores & Clocks
- Cores
- 12
- Threads
- 24
- Base clock
- 3.1 GHz
- Boost clock
- 4.3 GHz
- L2 cache
- 6 MB
- L3 cache
- 64 MB
Memory
- Memory support
- DDR4-3200
- Memory channels
- 2
Platform
- PCIe version
- 4
Benchmarks
- Geekbench 6 (single)
- 1,735Bottom 43%
- Geekbench 6 (multi)
- 9,504Bottom 50%
- PassMark
- 30,545Top 35%
- PassMark (single thread)
- 2,605Bottom 24%
Quick answers
Is the AMD Ryzen 9 3900 good in 2026?
The AMD Ryzen 9 3900 earns an Inno Score of 54.8/100 (“Average”) based on its specs and benchmark results. AMD's Ryzen 9 3900 is an OEM-only Zen 2 (Matisse) desktop processor for socket AM4 with 12 cores, 24 threads, a 3.1 GHz base and up to 4.3 GHz boost clock, and 64 MB of L3 cache. It runs at a 65 W default TDP, supports PCIe 4.0 and has no integrated graphics.
What are the key specs of the AMD Ryzen 9 3900?
Cores: 12 · Threads: 24 · Boost clock: 4.3 GHz · Socket: AM4
What are the closest alternatives to the AMD Ryzen 9 3900?
Its closest rivals on InnoReviews are AMD Ryzen 5 8400F, AMD Ryzen 7 5700X3D, AMD Ryzen 9 3900X — open the comparison pages for a spec-by-spec breakdown.
