It might be solo elpida memory, so yes, even if is not showing memory errors some cards with memory modules poor yielded will give incorrect shares. There is no hope with elpida solo. Even if is using stock bios with stock clocks and voltage, problem still remains, try to change memory timings, down clock it might be the only solution, my guess is poor cooled memory modules cause that thing, so the only hope is to downclock your core clock 10% and check your power, the less heat generated the better.


Try 1000/1750 and see if there are still errors, if not then you go increasing to 1030 till you find the right spot.