Re: need urgent help with gtx 260
Strange problem and I had a similiar, have you get the Memory enough voltage and the MCH aka Northbridge.
On my P-45 DS3R i went nuts when I get it, nothing was stable and when I tried with just one mem stick, 2 GB it would work but as soon as I added the other 2GB stick it wouldent even boot sometimes and it hang upon say unrar or start a game. Then I found out that you must give the Northbrige more voltage then Bios default and voila, problem solved. And all this problem was without even overclock the Q6600!