He was already stable Marios a few post ahead (403), but thx for ya input also note he's runnign a quad which needs a different setup then the dual cores....

some stuff :

My Striker also ran fine with non SLI ram (Gskill PC6400Hz , same with PC6400PK, PC8000HZ all non SLI) only ram that gave me weird beahviour where the OCZ PC8500 SLI ones lol

I always disabled SLI support for the ram as it gave more probs then it should solve ( I did this from 0402 on but never tried enabling it afterwards ) according some users... Also the Striker ran usually better with the ram undervolted then running it at the settings prescribed by the manufacturer...

Memtest (DOS) ran fine with me though, dunno where that comes from, you referring to the winblows version ?