Apologies for dragging up an old thread, but there is yet another chapter to this saga.
Gigabyte finally got around to swapping out my board for a B3 revision (exact same board model otherwise). However after putting it all together I now get a combination of random boot loops (power on, drive lights come on, cpu fan comes on, then the system reboots before showing the POST screen) and if it manages to start booting I get random display corruption followed by a system hang.
The display corruption occurs fairly randomly, at first it would happen in the BIOS screen, sometimes during POST, sometimes when booting Windows and once over this weekend when I managed to get it to boot fully into Windows it happened about an hour into using the machine. The CPU temps were fine (< 37C) as reported by the BIOS monitoring screen and also by CoreTemp the one time it fully booted into Windows.
The replacement board shipped with BIOS version F2 and exhibited the above issues even after upgrading to the latest F4 BIOS from the Gigabyte website. In fact due to the boot-loop issue, the board has somehow decided to fall back to the F2 BIOS, I can only imagine this is some safety feature where it has fallen back to the second BIOS chip?
I have emailed Gigabyte to tell them about this and express my extreme displeasure. No other components were changed in the system, it was working perfectly fine and stable from the end of February till Thursday night when I dismantled it to take out the board for the swap on Friday.
I'm pretty sure the board is faulty, but is there anything else I could/should try? I'm not able to easily get hold of another SB CPU to test with.