Ryzen 9 3900X vs Ryzen 9 5950X — Specs & Performance Compared

Verdict: The Ryzen 9 5950X is ahead of the Ryzen 9 3900X on all 4 shared benchmarks on file, by 24% to 58%, including 58% in Cinebench R23 multi (29,441 vs 18,682).

Side-by-side CPU comparison of the Ryzen 9 3900X and the Ryzen 9 5950X. Released 2019 (Ryzen 9 3900X), 2020 (Ryzen 9 5950X). MSRP range: $499 · $799. Specs, synthetic benchmarks, AI inference tok/s, and Amazon availability below; each column header links to that part's benchmark page.

AMD

Ryzen 9 3900X

12 cores105W TDP$499 MSRP2019

Full Ryzen 9 3900X benchmarks →

AMD · Zen 3

Ryzen 9 5950X

16 cores105W TDP$799 MSRP2020

Full Ryzen 9 5950X benchmarks →

*Price sourced from Amazon.com. Price and availability subject to change.

Where to buy

A listing for each part; the current price and stock are on the retailer's page.

Specs side-by-side

Spec	Ryzen 9 3900X	Ryzen 9 5950X
cores	12	16
threads	24	32
base clock ghz	3.8	3.4
boost clock ghz	4.6	4.9
tdp w	105	105
l3 cache mb	64	64
process nm	7	—
socket	AMD Socket AM4	AM4

Synthetic benchmarks

Each row says whether a higher or a lower number is better (ranks and times are lower-is-better). Scores come from TechPowerUp, CGDirector, Geekbench Browser, GadgetVersus, CpuTronic, NanoReview, HardwareDB, PassMark, NumberWorld and HWBOT; each row links its sources, and where they differ the cell shows their median. Empty cells mean we don't yet have that benchmark on file for the SKU.

Benchmark	Ryzen 9 3900X	Ryzen 9 5950X
Cinebench R23 multi (higher is better) Source: TechPowerUp, CGDirector	18,682 points	29,441 pts
Cinebench R23 single (higher is better) Source: TechPowerUp, CGDirector	1,312 points	1,757 pts
Geekbench 6 multi (higher is better) Source: Geekbench Browser, GadgetVersus, CpuTronic, NanoReview, HardwareDB	9,259 points	12,237 pts
Geekbench 6 single (higher is better) Source: GadgetVersus, CpuTronic, NanoReview, HardwareDB	1,682 points	2,195 points
PassMark CPU Mark (higher is better) Source: PassMark	32,491 points	40,345 pts
PassMark Single Thread (higher is better) Source: PassMark	2,702 points	—
PassMark Single Thread Rating (higher is better) Source: PassMark	2,702 points	—
Y-cruncher 1B (lower is better) Source: NumberWorld	—	27
Y-cruncher Pi 1B (lower is better) Source: HWBOT	89 seconds	—

AI inference (tokens/sec)

Top community-reported tokens-per-second results for popular LLMs whose weights fit the card's memory, each linked to its source. See the per-SKU benchmark page for the full set including quantization and prompt length.

Ryzen 9 3900X

No verified AI inference results on file. See the Ryzen 9 3900X benchmark page →

Ryzen 9 5950X

llama3.1:70b: 18.5 tok/s (Phoronix)

All Ryzen 9 5950X AI benchmarks →

Quick answers

Which is faster, the Ryzen 9 3900X or the Ryzen 9 5950X?

The Ryzen 9 5950X is ahead of the Ryzen 9 3900X on all 4 shared benchmarks on file, by 24% to 58%, including 58% in Cinebench R23 multi (29,441 vs 18,682).

What did the Ryzen 9 3900X and the Ryzen 9 5950X cost at launch?

The Ryzen 9 3900X launched at a $499 MSRP and the Ryzen 9 5950X at $799. Street prices drift from launch pricing; the Where to buy section links current listings.