I am having this exact same issue (same system almost) and here is what I have found (still haven't fixed it on original system).
I have updated drivers
for the video card to the latest: no effect
I have placed the video card in a different computer with the same motherboard: Same problems appear with that computer
I have placed the video card in a computer that does not have the same motherboard: No failure in that system.
*I have placed a different video card in the originally crashing system and it works flawlessly.
I have wiped windows and started fresh: system works until I install updated graphics drivers.
My theory is that something is wrong between the graphics card and the motherboard but I can't seem to understand why this problem wasn't occurring from the beginning.