The issue in a nutshell: I can clock the CPU happily to 4.7GHZ with good voltages, and I can run as many stress tests as I want and it will appear stable. Until it goes into sleep mode, then upon resuming, it will BSOD, and it will keep BSODing at windows desktop every time the system restarts until I power it down or reset bios to defaults. If I simply power it down, I can get into windows fine at 4.7.
This problem only seems to kick in above 45 multiplier. 46 multi doesn't seem to BSOD, but system doesn't feel as responsive. 47 and above I will have the problem mentioned above.
Now, this may seem like some kind of voltage issue, but I have tried upping each voltage to a high but safe level individually, but that does not help.
I have tried setting all voltages manually, rather than anything being auto, but nothing.
I have tried upping the LLC to high from medium, same problem.
I have tried disabling all C states, C1E, and using manual rather than offset voltage, same problem.
I have tried upping the current capabilities of CPU and VCCSA, but same problem.
I have upped the startup CPU and VCCSA voltage, but doesn't help.
I have tried both 1005 and 1305 BIOS, but same issue.
I have disconnected all USB but my keyboard and mouse, but same problem.
Though I just realised I did not try disabling all onboard devices, but I did try disabling onboard sound at least. Will have to give this a try when I get home.
I have disconnected all drives, bar the system SSD. Tonight I will also try using a different SSD, and see if that helps.
I also have to try with just one 7970 in, but there is only so much time in an evening, and didn't get to test this possibility.
But in the mean time, I would love to get some input from people on why this could be happening.
I do think it is some kind of driver issues somewhere, as if I get BSOD and restart window in safe mode, it starts fine. But I am sure it a combo of driver and something to do with the board, simply because it only starts happening at 47 multi.