My display corruption at boot now seems to have gone. I have switched it off on 2 consecutive nights and it has started fine both times, the following morning.
I have taken the HIS card out a few times as it has become noisey and fiddling with the fan quietens it down for a few days. Maybe there was contact problem on one of the pins causing the corruption? Do you have a molex connecter plugged into the socket next to slot 1? I think its for crossfire but I have one plugged in just for stability maybe plugging it in might help?
I think the problem lies more with the card rather than the board, although I think this bios was released just for the sake of it, rather than actually fixing something. Still cant warm boot when overclocked and others say this bios makes a mess of raid. I'm still stuck @ 375 fsb but others seem to be getting 420 at a push. Until MSI can fix this board I can see lots of people replacing it.
I see you are using OCZ memory. Few people have got this board to even boot with that brand, maybe that may be causing you grief?