Yup, I have mentioned to remove overclocking at the very beginning of the thread, but I guess underclocking can do the trick, but know that in this particular case the card has issues, otherwise underclocking wouldn’t fix anything. I still think the issue is a combination of hardware and definitely getting the same card into another system and testing it, would give the hint we all need to understand whats going on, because if it works with original clock speed then the culprit would be the mobo.