Vindimy you are right, I have the XFX 7970's and they do not get good air flow. My one 7970 runs at about 93 degrees all the time while mining, but I am running three monitors off of it at once.

I took your CGminer flags and modified them for GUIminer and still can not get much better then 620Mh/s on one card and 490Mh/s on the second card. Vindimy do you have your cards connected with a CrossFire cable?