TaigaIV

Finally found the origin of my problem, i think one of the 12V rail of my PSU is faulty (both card, regular system freeze, tryed one card at a time using different rail, with the good one no problems). With one card, DCS A-10 freeze up to 20 seconds time to time (too regularly to be playable), with both card no problem (except my system fully freeze when playing other games but it's not coming from the card ).

This was'nt intended to offend any one, by modern i meant using DX 11 and heavily relying on eye candy, which is not really the case with DCS serie (and doesn't hurt). If this is an answer to having problems with unofficial drivers, i tried various official drivers before trying unofficial, didn't have time yet to go back to old (and slow) drivers from original cd, but i consider retrying them.

That's one i tryed without succes. I've launched furmark without troubles for half an hour today (using unofficial from this thread), but i'am unable to run 'modern' games for more than 10 minutes without crash.

Everythings worked fine (dcs a-10c and some other games, didn't made a lot of test considering CF with dcs a-10c but default framerate is ok) until i decided to get into troubles. I've installed latest drivers from amd web site, i now need to reboot after 5 minutes of usage. I've tried the official drivers, 12.1 preview, 12.1a preview, and actually downloading the unofficial beta. If this one doesn't work i'll fall back to drivers from the cd (wich look slower but stable).

Just installed them in CF, working fine using driver from CD. You can give a try to : http://www2.ati.com/drivers/hotfix/radeon_7900_series/amd_radeon_hd7900_win7_64.exe (i tried catalyst 11.12 without succes, i don't think they integrated hd 7970 drivers in this release, when choosing drivers for this card on amd web site you get another page than the one for catalyst 11.12).