Hi guys, I'm having an issue with my rig setup and cards. This is my first nVidia rig and been running it with x86 Win7. Cudaminer seems to crash when cards are either in overclocked or in stock mode, software like Afterburner, Gpu Tweak and OC Guru just crash the system. I'm pretty sure the issue is with the cards brand, these ASUS 750Ti just really suck at OC'ing - hardly breaking 280 kh/s barrier per card with a 5 card setup:
Biostar H61B, 1*PCIe 16x, 5*PCIe 1x
32 GB SSD
XFX XXX Edition 750W PSU
Win7 pro x86
5*ASUS GTX 750Ti, all on 1 to 16 powered risers (seems that the problem is here?)
The longest I've run before Cudaminer crashing is about 8hrs. Does anyone have nice Kepler bios settings I can flash or other remedy to break the 300 kh/s per card barrier on these crappy ASUS cards?