i do the max mem/gpu in ati tray tools...and it reports that i can run my core at 426 and my memory at 554,no artifacts....i run ati tool....and i cant even run 420/535 without it saying artifacts found.....ive been gaming in doom 3 and americas army with it at 425/1105 and saw no artifacts....whats the deal here?should i try one over the other,or should i just trust my eyes in games?some help would be great here guys,thanks a ton!