I know I talked about this i another thread, but I searched over and over and I couldn't find it. After I changed my case, I found out I out a fan in the wrong direction. I realize this since I changed to an aluminium case, with lots of room, and added 2 fans more (totaling 6 in that moment with the PSU) and the heat level was the same in the other case.
So I checked my air flows and I found a fan that I put inversed , so the fan next to it will take the hot air out of the case, and this fan would bring it back in.
Also I noticed the CPU fan extracting the hot air from the heatsink, instead of pushing air to the hotsink, and I was thinking it should be the oppositive.
Well, I said I was going to to inversed the CPU fan and I flip over the CPU fan (included with the CPU, AMD RETAIL) and what happened?? At first I thought there was no difference, but not I see it runs at 48 when I am away from home (and fans are at high Speed) and 50 when I am using the PC and the fans are reduced. Playing MOHAA the maximum was 51 and I also had eMule working, so there was a lot of writting to disk.
Basically, it is running 1 degree less (Celcious) and the fans spin at 1000 rpm less average. That is a big difference mostly for Db.
So, here is my little experiment. Fan blowing air to the CPU work better than extracting.
Maybe this layout is for more room cramped configurations since the air around would be hot.