I get this message after running the system stability test for 20 some minutes, but only when I checked the gpu stressing. When I run cpu, fpu, cache and memory it runs fine. I tested the gpus separately in furmark and they seem stable for more than 30-40mins at 76 and 78 C.
System is,
Asus sabertooth 990fx
AMD fx8350
16gb ram
2x Asus Gtx 760
Runs on ssd (840 evo)
Win 8.1 all up to date
Aida64 v 5.00.3300 (trail)