1st Setup: ASUS P6T SE, i7 920, CM850M Corsair PSU, 6GB RAM.
2nd Setup: ASUS P7P55-M, i3 550, 750TX Corsair PSU, 8GB RAM.
Originally, I bought a 2nd MSI R6970 Lightning for the 1st setup, and it ran fine in Crossfire (Even in 1 PCI-E x16 slot, and 1 x4 slot). Ran fine for about a week. Then quick, random crashes under load. The factory R6970's are OC'd at 940 MHz Clock. Tried upping the PSU from 750 to 850. Same thing. Tried removing one card. Tried swapping cards. Tried different PCI-E slot (x16 & x4). Tried 5 different drivers, tried clean install of Windows. Newest BIOS installed. All Diagnostics lights on GPU are lit and steady. EVERYTHING WAS FINE IN THE BEGINNING WITH NO OTHER HARDWARE, OR SOFTWARE INSTALLED. Also have a higher end surge protector connected to a redundant surge protector.
I had to 'underclock' cards to 880 core to be stable.
SOOOOO. I built the 2nd setup (Only 1 PCI-E slot). Both cards do EXACTLY THE SAME THING. Swapped Cards, swapped PSU's, even swapped memory! Switched BIOS switch on GPU. Again a clean install of Windows.
BOTH cards are behaving EXACTLY the same way in MANY different configurations. I HAVE TO UNDERCLOCK THEM to be stable under load..
.
My question is this...Is it possible that one card went bad, or is starting to, and damaged the other either through the MB, or the crossfire connection? MSI & ASUS ARE OF ZERO HELP!!!!!
p.s. Nothing was ever overclocked and temps on CPU and/or GPU NEVER exceed 68 degrees.
2nd Setup: ASUS P7P55-M, i3 550, 750TX Corsair PSU, 8GB RAM.
Originally, I bought a 2nd MSI R6970 Lightning for the 1st setup, and it ran fine in Crossfire (Even in 1 PCI-E x16 slot, and 1 x4 slot). Ran fine for about a week. Then quick, random crashes under load. The factory R6970's are OC'd at 940 MHz Clock. Tried upping the PSU from 750 to 850. Same thing. Tried removing one card. Tried swapping cards. Tried different PCI-E slot (x16 & x4). Tried 5 different drivers, tried clean install of Windows. Newest BIOS installed. All Diagnostics lights on GPU are lit and steady. EVERYTHING WAS FINE IN THE BEGINNING WITH NO OTHER HARDWARE, OR SOFTWARE INSTALLED. Also have a higher end surge protector connected to a redundant surge protector.
I had to 'underclock' cards to 880 core to be stable.
SOOOOO. I built the 2nd setup (Only 1 PCI-E slot). Both cards do EXACTLY THE SAME THING. Swapped Cards, swapped PSU's, even swapped memory! Switched BIOS switch on GPU. Again a clean install of Windows.
BOTH cards are behaving EXACTLY the same way in MANY different configurations. I HAVE TO UNDERCLOCK THEM to be stable under load..
.
My question is this...Is it possible that one card went bad, or is starting to, and damaged the other either through the MB, or the crossfire connection? MSI & ASUS ARE OF ZERO HELP!!!!!
p.s. Nothing was ever overclocked and temps on CPU and/or GPU NEVER exceed 68 degrees.
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