Best Gaming CPUs Under $400 (2026)
Our top picks for high-refresh gaming and streaming, ranked by real gaming benchmark scores. Every CPU below links directly to its current Amazon listing.
AMD Ryzen 7 9800X3D
The best value under $400, with a gaming score of 100/100, 8 cores / 16 threads. Estimated price: $399.
Price updates automatically · Ships from Amazon
More Great Options Under $400
Frequently Asked Questions
What is the best gaming CPU under $400 in 2026?
The AMD Ryzen 7 9800X3D is the best gaming CPU under $400, with a gaming score of 100/100 and an estimated price of $399. It offers 8 cores and 16 threads for high-refresh gaming and streaming.
Is $400 enough for a good gaming CPU?
Yes. At $400, you can get a processor capable of high-refresh gaming and streaming. Our picks are ranked by real gaming benchmark scores, so you know exactly what performance to expect.
Should I buy AMD or Intel under $400?
Both AMD and Intel make strong gaming CPUs under $400. AMD's X3D chips often lead in pure gaming performance thanks to 3D V-Cache, while Intel offers strong multi-core value. Compare the specific models below to see which fits your priorities.
Will this CPU bottleneck my GPU?
The AMD Ryzen 7 9800X3D has 8 cores, which is enough to avoid bottlenecking most modern GPUs in gaming. Pair it with a GPU from our best-graphics-cards guide for a balanced build.