Is an RTX 5060 and i5-9600K a good combination for 1440p gaming?

A newer midrange CPU such as a Ryzen 5 7600 or a Core i5-12400F would be a reasonable platform upgrade, but you’d also need a new motherboard and, depending on the platform, DDR5 memory. With an RTX 5060 at 1440p, the difference may not be dramatic unless you play competitive games at very high refresh rates or run into stuttering.

Before replacing the platform, consider upgrading the memory setup. If your 16GB is a single stick, adding a matching module for dual-channel operation could help smooth out performance. Also monitor whether games are using nearly all 16GB, since moving to 32GB may reduce hitching in newer titles.

A 700W power supply should generally be plenty for an RTX 5060 and an i5-9600K, assuming it’s a decent-quality unit and not extremely old. I’d only replace it if it lacks the required connectors, is showing instability, or comes from an unreliable model.

At 1440p, the RTX 5060 will usually be the limiting component before the i5-9600K, especially in graphically demanding games. If your GPU is running near full usage and the CPU isn’t consistently maxed out, there’s probably no urgent reason to replace the processor. Check CPU and GPU utilization while playing the games you care about before upgrading.