rgd1101 :
What is your full system spec? look like gpu is failing.
i used to get a Nvlddmkm.sys error but once i fixed that the problem left and came back recently with DPC_WATCHDOG_VIOLATION
i have a custom build with a
intel core i7 3.20 GHz
nvidia 560 Ti
Barracuda 1T Hard Drive
Sabertooth x58 motherboard
600 volt cooler master power supply
and 6 G of ram