Good evening everyone I searched the forum on this problem and I didn't find anything conclusive. I was getting this error with my EVGA 9800GTX intermittently so today I just installed my new EVGA GTX 260 216 SSC 55NM video card and I am still getting UNKNOWN ARCHITECTURE. My sys spec ABIT AW9D-MAX BIOS 15 CORSAIR DOMINATOR DDR2 PC 8500C5DF 2X2 4GB OCZ GAMEXTREME 700 PWR SUPPLY EVGA GTX 260 216 SSC VC WIN XP SP3 I uninstalled and reinstalled the program but to no avial. Any ideals??