Here's How...

Didn't know where to post this, but guessed here is a good a place as any.

 

Only realised recently that the cooling fan on my PSU, which I'd mounted in the usual place at the top of the case, was actually pulling fresh air IN, and thus blowing WARM/HOT air INTO the top of the case, and directly DOWN towards the mobo and video card. When added to the fact that the two large case fans at bottom front, are also pulling in cool air for the hard drives, this was NOT a good combination.  I couldn't believe I'd been running like this for so long.  What a numpty!

 

I realised my case (CMStacker) is designed for a second PSU at the bottom, so stripped down the whole thing and moved it down.  Not only does the case have a better cog for flying;-) but my CPU and GPU temps are almost 5degs cooler that when I started.

 

Well bloomin chuffed;-)

Nice one, Phil. That was precisely the reason I went for an Antec 900-2 case so that I could mount the PSU at the bottom and just leave the HSF to draw in the cold air.