Ryzen 5 5600X on a system with 4.2GHz processor speed
Ryzen 5 5600X on a system with 4.2GHz processor speed
You're actually underperforming by limiting it to 4.2Ghz—it naturally rises to 4.6Ghz on its own. That core voltage is significantly higher than what's needed for that low clock speed (the CPU should run at 4.7Ghz at 1.35V). Also, the temperatures at 90°C in a 240mm AIO aren't ideal; it likely relates to your voltage settings (the CPU is rated at 65W while yours is drawing 150W).
Transitioned to CPU designs, motherboard configurations, and memory systems.