Hi! "In old times" I started to have flickering screen, after setting up the ATT. Nowadays, I am still getting flickering screen right after installed Ati Tray Tools, restoring default settings won't help. -Flickering stops after uninstalling ATT and reinstalling ATi drivers. Which reasons might cause my screen flicker when on 3D? And the specs are: -Gigabyte MA790GP-DS4H with latest bios -AMD Phenom 9850BE (Stock Hz) -2X1GB DDR2 1066MHz (Stock) -MSI Radeon 3870X2 (Main, Stock Hz) -Asus Radeon 3870X2 (Below main, Stock Hz) -SATAII/SATA Harddrive / dvd drive -Windows XP Professional X32 -ATi Catalyst 8.10 -1,5L bottle of Mountain Dew Thank you!