Build estimate
Ryzen 5 5600 and RTX 4060 bottleneck estimate
The Ryzen 5 5600 and RTX 4060 are usually a sensible midrange match. For 1080p gaming, the CPU can become the limiter in high-refresh esports or simulation-heavy games, but many typical single-player games will lean on the RTX 4060 first.
1080p
Expect a mostly balanced result. CPU limits are possible when targeting very high FPS, but the RTX 4060 is not so fast that the Ryzen 5 5600 is automatically a bad pairing.
1440p
At 1440p, the GPU becomes more important. The RTX 4060 may need reduced settings or upscaling in demanding games, while the CPU remains acceptable for most workloads.
Upgrade advice
Upgrade the GPU first for higher resolution or better graphics settings. Upgrade the CPU first only if your target is high-refresh 1080p and your games show underused GPU headroom.