After a couple of weeks of happy vertcoin mining with 5x EVGA 750ti's, I can't get anywhere now. When Cudaminer first started crashing, I found it worked fine when I removed the two cards on powered risers. So then I mined with three cards for a few days. But now it just crashes on startup... with one, two, or three cards in the 16x slots. I've switched them around, no luck. I've reinstalled drivers, no luck. Stopped overclocking, no luck.
Win7 64 bit, Sempron processor. Any suggestions?
Mobo is new, no apparent damage. Power supply is new, only drawing about 60% of its capacity when everything is hashing. I don't think either of these are the problem.
Helps?
Does this only happen when you use cudaminer?
Try running a game or a benchmark.
Does the driver crash together with cudaminer?
Have you tried explicitly removing the driver and installing it fresh?
sometimes that can make a difference, especially with amd cards.
Crashed on GPU benchmark... clean reinstall of driver... crashed on GPU benchmark again. Repeat. Same result. But now the rig won't power up at all.
Figured I had a bad motherboard. Started disconnecting it from the power supply (brand new Seasonic Gold 600w). Found that the power cable for the GPUs on the risers was melted at the power supply. Obviously not Cudaminers fault!
Edit: Two fried pins on the motherboard main power cable too. They were hidden behind two capacitors. Ouch.
