I've tried everything ! Specs : - A7M266 ver. 1007 - AMD 1800 XP - 128MB DDR 2100 - G2mx200 - WinXP i've changed the mobo, cpu and memory, thing helped. my PSU is 400W and i know it should work with those systems like mine. it cannot be a cooling problem cause i got a good H&F + air conditioning + big fan infront of the open case. temps ARE low. fbs 100MHz : everything works just fine, BUT its not what i paid for. [i'm quite poor] fbs 133MHz : after post, i get this 2-3 sec of black screen, then a blue screen with long error mesasage that tells me nothing important. Please help me..