wierd cooling?

[xarar]

For some reason I have just recently tested that I get better cooling to my proc when I turn off my 120 mm 90 cfm fan that used to blow about 2 inches above the HSF which is a 60 mm 35 cfm coolermaster aluminum HS.

When OC'ed (1533[133] - 1667[145]) I get 35C idle with 25C case temps. 36ish when low load and 37.5 Full load
With the 120 mm fan on I got 34C idle with 24C case temps, 37 low load, 39.5/40 full load.

To get full load I ran super pi to 4m (15 mins) with winamp playing mp3 with AVS "the box" on full screen and monitored it with MBM5.

I'm just curious why I got these wierd cooling temps. I'm pleased I found this out but it just baffles me.

 

[DS1MCSE]

This is probably due to the decreased air turbulence with the fan turned off. Thus, the HSF is getting a better convection cooling effect.

To further the experiment, try removing the 92mm fan altogether and just leave the fan guard over the hole. I'm betting that your temps will fall a bit further because you won't have that big ass fan blocking the exhaust port.

Good luck!