To add, I can cold boot the machine, head straight to 3DMark06 and see the issue straight away which leads me to think it's not a heat issue. I can replace the thermal pads for around £16 it seems, but not sure if it'll be a waste of time.
Hi, have you tested it with another power supply, monitor if you don't have one connect it to your tv, connecting your dvi-cable or hdmi cable to other dvi ports on the graphics card, pci-express power connectors properly connected? boot into safe-mode and see if still happens.
Could be your PSU, monitor or graphics card. Should not have taken the card apart and flashed the bios, that should have been the last resort. Test with another GFX card or onboard video if you have any.
I've tested it with separate monitors, cables and have reseated both the card and power cables.
I don't have another PSU to test it with currently, although I'm pretty confident it's memory related and not power related (famous last words).
In regards to taking the card apart, it's a pretty simple process and these cards are well known to rattle which was driving me crazy. Replacing the fan solved this.
Updating the vbios was worth a shot, the new version is known to fix some random bugs including artifacts, also I have a copy of the original vbios saved so no harm done trying.
I've had this card in two motherboards and it does the same in both.
Well, BF3 seems to set this off- getting corruption on the outside BF3 Beta map and I've even tried clocking the memory down to 750MHz.
The only thing I haven't tried is underclocking the memory (tried clocking it up at bit), I can't see to find an application that can do this.
Was thinking about replacing the thermal pads to see if this makes any difference, but not entirely sure what thickness to use with the default heatsink, 3mm which can compress down to 1.5mm "seems" about right?