ASUS P5W DH - Problems + Fixes Thread

[P5WDHdeluxe]

My pc has the following parts:
Asus P5W DH Deluxe
E6600
2 * 1GB Kingstone @ 800
MSI 8800GTS 640MB

With the latest bios every tme i had for my cpu temps around 28-35 c and for my mobo 40 - 45 c. Everything on stock cooling...
I mounted for fun a forgotten Zalman Fan ( http://www.zalman.co.kr/eng/product/...dx=15&code=016 ) under my GTS... Suprised i saw on next boot my Mobo has temps lower than my Cpu! Around 26 - 28 !!!!
So cause the mounted fan is hitting the ICH7R Chip and cooling it i have so much lower temps? It is true that the warm heatsink of my GTS is almost totally covering the above chip i mentioned... So what happened? The mobo temps for the P5W DH Deluxe are measured by ICH7R?

ps: Just to mention that my pc case doesn't have any side fans... i mounted this fan in my case... so "no fresh" air is coming throught this fan...