New
#31
That's rather a drastic next step. I'd hold up on buying a new motherboard for the time being.
Consider the facts, it seems to be with Windows 7 64-bit, up until you changed the drive, it appeared to also be associated with an SSD. It is happening with other makes of motherboard other than Gigabyte. I strongly suspect (but can't prove) W7 64-bit is the culprit. However I and several others are also having problems with w7 64-bit + SSD + Creative Labs x-Fi series sound cards (not BSOD, but loss of sound) you wouldn't happen to have one of those would you? It might just be a sound driver problem giving the BSODs as well as the sound loss. Or even some other driver we haven't identified yet.
In the mean time, please try a little experiment for me.
Start > shutdown > sleep
wait till the screen goes black, then hit any key or move the mouse.
For me that gives an instant BSOD followed by immediate total shutdown within a second or so - I can't read the BSOD screen it's so quick.