I was mining perfectly, then all of a sudden, tons of hardware errors.

Any ideas why?

Heres my config for 4 7970 gigiabyte

setx GPU_MAX_ALLOC_PERCENT 100
cd C:\Users\RIG\Desktop\CPRMINE
cgminer -o wk1.botpool.net:5333 -u pw -p x --scrypt -I 13 -w 256 -g 2 --thread-

concurrency 8191 --gpu-engine 1042 --gpu-memclock 1500  --auto-fan --temp-target 75 --

temp-overheat 80 --temp-cutoff 85