Hi to all. I need some opinions here. I had a BFG 8800GT OC2, after a month or so I started getting the nvlddmkm.sys BSOD. I got the card exchanged by a brand new BFG 8800GT OC2, and again after a month or so the nvlddmkm.sys BSOD came back. After that I got my money back and bought an ASUS GTX260 and now after a month the nvlddmkm.sys BSOD came back. Given that 2 8800 got the same problem and now a GTX260 from another brand got the same problem Im thinking that: Either the motherboard is damaging my cards or my PSU is damaging the cards. What do you think? Thanks. Once upon a time the floppy disk was king.

Forgot to mention, BFG stated that both 8800GT cards had manufacturing problems. But now given the same problem on an ASUS, i'm considering board or PSU as I stated above. Thanks. Once upon a time the floppy disk was king.

And another thing I just remembered. While the second 8800GT went for testing I had my 8600GT working perfectly in the same machine for several months without BSOD. Wich contradicts my theory about mobo and PSU. I formated and reinstalled OS several times and tested all cards with diferent drivers with no sucess. Thanks again. Once upon a time the floppy disk was king.

"I had my 8600GT working perfectly in the same machine for several months without BSOD. Wich contradicts my theory about mobo and PSU." The 8600GT draws far less power than the 8800GT and GTX260. Any old PSU will power an 8600GT. The 8800 and GTX 200 cards, however, represent more of a challenge. Main System: Dual core Opteron 185 @ 3.2GHz Two 8800GTS cards 4GB PC3200 Blu-Ray X-Fi Titanium Pro A8N32-SLI Deluxe Samsung 24" LCD Vista 64 SP1

But if it was the mobo thats damaging the cards, wouldnt the 8600 be damaged as well? I said that because both the 8800GT and GTX260 are connected to the PSU by the PCIex power connector, however the 8600GT doesn't have power connector. Thats why I suspect that my PSU is damaging the cards. Once upon a time the floppy disk was king.

"Thats why I suspect that my PSU is damaging the cards" If anything, the PSU is probably underpowered & the cards are starving to death. It would help to know the make/model of both your board & PSU. "If my answers frighten you then you should cease asking scary questions" - Jules Winnfield (Samuel L. Jackson) in Pulp Fiction

Yeah your PSU is underpowered, cheap, or both. With the first system I built, I used the power supply that came with the case I bought. I kept getting blue screens related to the video card driver. I thought the video card was at fault and took it back. The next one of a different brand did the same thing. Changing the drivers for the AGP controller made it stop blue screening so often but 6 months after I built the system, the power supply went out. WinSimple Software