When I overclock my cpu from stock(3.0) to 3.52 = 225x 15 and my graphics card via coobits(Nvidea 7800gtx) stock is 435 x 1.20, I clock that to 470 x 1.30 it passes the test to implement it and all works fine, As soon as I run a benchmark eigther 3d mark 03/05/06 it won't complete them it stops and gives me a black screen and the only way to do any thing is to re-set it..I am 1 fed up person atm pls Help.... 
