Is the i7 14700K a good CPU upgrade for my RX 7800 XT?

Honestly, when it comes to gaming, the i7 14700K and the i5 13400F perform similarly. There's no definitive 'better CPU for a GPU' since it really hinges on your use case. If you're not planning to game at ultra settings or need insane frame rates, the i7 might be overkill. If you're experiencing issues with CPU-bound games and think you need more power, an i5 14600K could be a great upgrade.

It really depends on what you're planning to do with your PC. If it’s strictly for gaming, the i7 14700K might be more than you actually need unless you're aiming for top-tier performance or pushing high refresh rates on competitive games. You might want to consider an i5 14600K instead, as it could serve you just fine for gaming without breaking the bank.

The performance difference between the 13th and 14th gen CPUs is minimal, so going with the i5 14600K is totally fine for gaming. If you're facing issues with your current setup, you should consider upgrading the entire system down the line—motherboard, CPU, and RAM all together. The 14700K might not make a noticeable difference in your current gaming experience.