GTX260 Video Artifacting/BSODs

Windows tracks physical pages of memory using a table called the Page Frame Database. This database (which actually is just a big one-dimensional array) is indexed by physical page number. As a result, the page frame database is typically referred to as the Page Frame Number list or PFN. This ususaly accours for one ot two reasons, the first is being memory corruption. If their is a buggy driver in the system that is writing on memory that it doesn't own it could easily corrupt one of it's PFN lists or entires. So as suggested all ready try removing the nvida driver as explained and then reinatall it. Or you could just let windows install a driver and see if the issue still appears. Bad pool lits or header. Once again a driver issue. Just a thought you said you ran memtest have you tried it with one stick in at a time? Also try just using 1 stick after doing the driver reinastall. I would also like to have a look at what CPU-z lists as your memory and timings. Could you Copy and Paste screen shots of it on both sticks? CPUID Thanks. Fabe

Your tRas is tighter than the XMP profile suggests 21 instead of 23. Try loosening that to match.

smartyeyeball is right I would follow his suggestion. Then as to which slot I would refer to the manual. It's been a while since I have done any memtesting but some Motherboards will recommend the slot some won't my DFI was the one closet to the edge of the board is how we explained it then.So I would see if they say if running only 1 stick place it in slot X. Times? 8- 10 passes. Seems like a lot but once again certain numbered calculations during one pass such as the 5th(if I remember correctly) in the sequence on memtest stresses the memory more than other calculations.Fabe

After troubleshooting with some friends, they seem to think its the power supply. What do you guys think about my 630watt rosewill? you think it actually puts out 630w continously? According to my GFX card it needs 550w. Would the psu be supplying enough?

Is this the PSU?

Newegg.com - Rosewill RX630-S-B 630W ATX12V v2.2 & EPS12V v2.91 SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Power Supply - Power Supplies

The 12v rails are getting close to a 260's max amp load draw, but it should be okay. (Amps are more important than wattage)

What 12v rail do you have your card connected to?

Just remember that normally the hardwired 4/8 pin CPU power and 24 pin motherboard power connectors are generally part of the 12v1 rail. Perhaps try connecting the card to to a different 12v rail to further 'evenly distribute' the load. ie connect the card to 12v2, 12v3 etc

If memtest with the correct timings / voltages are passing okay, and the power distribution is even - then unfortunately you could indeed be looking at a faulty card after all.