Hello,
Integrated GPU (iGPU): The Ryzen 5 8600G has an integrated GPU, even if you're not using it. The additional silicon for the iGPU can contribute to higher idle and load temperatures compared to a CPU-only part like the 5700X.
Power Target (TDP): Check the TDP ratings. The 8600G may have a different power profile that results in more heat generation.
Possible Causes for Higher Temps
Cooling Solution: If you're using the same cooler as you did for the 5700X, ensure that it's seated correctly and is capable of handling the 8600G's heat output.
Thermal Paste Application: If the thermal paste wasn't applied evenly or has degraded, reapplying it could help. Use a quality thermal compound.
Ambient Temperature: If your room temperature is higher than when you used the 5700X, that can affect idle and load temperatures.
BIOS/Voltage Settings: Check your motherboard's BIOS for any settings that might be pushing the CPU to higher voltages than necessary. Ryzen CPUs often have an aggressive voltage curve by default.
Recommendations
Reapply Thermal Paste: This is always worth trying if you're unsure about the initial application. Clean the old paste thoroughly using isopropyl alcohol before applying a new layer.
Cooler Compatibility: Ensure your cooler is adequate for the 8600G. While both CPUs have similar TDPs, the heat density from the integrated GPU may necessitate better cooling.
BIOS Update: Update your motherboard's BIOS to ensure compatibility and optimized performance for the 8600G.
Fan Curve Adjustment: In your BIOS or software like Ryzen Master, adjust the fan curve to ramp up cooling earlier if temperatures are concerning.
Monitor with Software: Use reliable software like HWMonitor or Ryzen Master to confirm the reported temperatures and check for unusual voltage spikes.
If, after these steps, the temperatures remain consistent but don't cause thermal throttling or instability, your 8600G's temps might just reflect its design characteristics. However, if you notice unusual behavior or instability, further investigation into cooling and configuration might be necessary.
