As the owner of an Asus Striker II Extreme, I can confirm it has been nothing but headaches, just trying to get it to run on stock 1333 FSB with a quad core and 2x2gig stock 1333 ram has been an issue. I and anyone else that I know that has this board experience constant freezes.
Check out the QVL on ASUS site, currently only 1333 MHz ram is listed as certified, and in nothing more than a 4 gig config.
In order to even think about trying to run some ram to at higher RATED speeds, you have to increase the latency timings and in some cases disable some of your cores on a quad core processor.
And yes, I'm on the latest BIOS and have restaged multiple times due to corruption issues , some people have reported Hard drives being 'eaten' by the corruption.