[DuckieHo]

A well-regulated PSU can reduce stress on the motherboard's VRM. The VRM don't have to work as hard filtering and stepping down the voltage. However, that wouldn't account for a 20-30C difference in temperature.

 

[DuckieHo]

Quote:

Originally Posted by TheReaperWaits You might of been over stressing the old PSU making it run hot and the new one is barely under load so will run nice and cool... (not too mention it will probably have better fans and be clean)...

That doesn't account for CPU temps. Even if the old PSU was 60% efficent, the heat dump wouldn't account the temp changes.

Quote:

Originally Posted by Phaedrus2129 The wattage itself doesn't matter, but if you were badly stressing the PSU then it may have been giving too high/low voltage, which would cause the voltage regulation circuits on the motherboard and graphics card to have to work harder and generate more heat.

That wouldn't account for a 30C difference though....

Swap the old PSU back and check temps again?

 

[DuckieHo]

Quote:

Originally Posted by Phaedrus2129 Maybe it was overvolting on the +12V rail? I've seen +12V readings of 12.3V or higher causing components to overheat, though I thought the motherboard's voltage regulation was supposed to fix the voltage as it reached the board.

ATX specs allow the voltage to be up to +12.6v so the VRM's should be able to handle that. The VRMs are suppose to stepdown the voltage to .9-1.6v (depending on CPU, of course). So 11.4-12.6v still should be converted to the same voltage to the CPU. Since the CPU is getting the same voltage, its temps shouldn't rise (but the VRMs might).

 

[DuckieHo]

Quote:

Originally Posted by Megaman_90 Sounds like your old PSU was pushing out unstable/high voltage.

Read above.

CPU gets the same voltage since the VRM filter and steps down the input voltage. Current is dependent on the CPU's draw. Therefore, the CPU's current, voltage, and wattage should all be relatively consistent and hence would not account for a 30C increase.