when i first got this setup, with my asus crosshair II and my amd phenom 9850 BE it all worked great no problems with sata vista xp or anything. and then my motherboard shorted and i got it replaced under warranty, and when i got it back i set it up the same way as before, but it wouldnt turn on when i put the processor in, so i had another am2 dual core laying around, so i put that in and it booted right up, so i went and did a rma on it and they replaced the 9850 with a new one, so when i got that back the other day, i put it in carefullym and correctly, and it still won't turn on just like before, so i'm cluelesss. also i have already updated my bios to 1402, so its not that.