Intel Core i7-6700K vs Intel Core i5-8400
For gaming, the Intel Core i7-6700K is 4% ahead on our index. The rows below show where the other one still wins.
Gaming index 53 51
Cores 4 6
Threads 8 6
Top speed 4.2 GHz 4 GHz
Rated power 91 W 65 W
Games at recommended 196 194
Released20152017
Processor-heavy games only the Intel Core i7-6700K meets
Quick answers
Is the Intel Core i7-6700K better than the Intel Core i5-8400 for gaming?
Yes — on our gaming index the Intel Core i7-6700K scores 53 and the Intel Core i5-8400 51.
What is the fastest graphics card each one can keep up with?
At 1440p, by our bottleneck model: the AMD Radeon RX 6700 10GB for the Intel Core i7-6700K, and the AMD Radeon RX 7600 XT for the Intel Core i5-8400.