my 2400+ XP was running at 64C Idle when I had nothing but the stock HSF on it and no other case fans.....this was before I knew about PC's though....got it down to 54C but now I wonder if it was the motherboard I had it in, because my friend has that CPU in an ABit board I sold him and it's reporting like 39C whereas mine in the MSI board showed 55C
If your PSU has a fan blowing out the bottom it could be blowing hot air right on the CPU
I've never come across a PSU with the fan on the bottom blowing onto the CPU.
The bottom fan sucks in air, and the back fan blows it out...works exactly like the one you linked except the fan is in a different place...
That's the only difference.