@Dave - Do you know if performance has improved with bios updates? I am looking to get this board as the extreme would probably be overkill for myself. I'm looking to go for a 3770k, SLI 680 setup (or maybe even a Titan ) and will simply be using an x60 Kraken for CPU cooling. Also, any suggestions regarding a fast 16gb RAM kit would be very much appreciated with regards this board. Thanks
Performance rarely improves with BIOS updates. The kit I used in the review is a good choice, but I also have a memory set I reviewed that will go live soon that makes a good combo with this board, also in color.
As to Windows8, I test all boards with Windows8 as part of my regular routine. There is an issue with the Windows8 BIOSes on this board, and overclocking. Really though, I have found this problem is found on all Z77-based boards, but not X79. I use Windows8 daily on my X79 rig with an ASUS board with no problems at all.
Windows8 and overclocking on Z77 can cause BIOS corruption, to the point that multiplier and voltage changes can be made in BIOS, but never actually hold. If pushed a bit more, this will completely render the board useless for overclocking, since no changes in BIOS have any effect.
Of course, flashing the BIOS to an older version, and then flashing back can sometimes fix this, but not always. ASUS is aware of the issue, has replicated it(Shamino posted on XS he's got it now), and is working on a fix, if possible. This same fix would then roll into the other ASUS Z77 boards, and maybe to other brands as well.
I do not believe that ASUS is at fault for this issue, and it's more Windows8 and Intel's most recent MEI, but I am not sure 100% what the real problem is...I just know I can make it happen on any Z77 board, with nearly any config. It might be related to how Windows8 has hybrid hibernate mode that allows for fast resume.
So, to avoid this problem, when overclock testing, use BIOSes prior to 0906, find your stable clock, and then you can update to newer BIOSes if needed.
I have to say, too, that it is not the board crashing that causes the issue.. for me, I use a VGA crash to get the BIOS corruption. And I also got the same BIOS corruption on the Gigabyte Z77X-UP7 that DrDeathX here mentioned. I reviewed this ASUS board back in July, and there were no issues..the problems began with a BIOS update that came out in late August, and has persisted since.