My ASRock P55 Extreme is a nice board. I am very pleased with it so far. It allows you to use your 775 socket cooler and has tons of OC feature (looks and acts like a higher priced board). I went with the gskill 1600 9-9-9-24 i think? I read that the biggest gains RAm wise came from tighter settings rather than higher speeds. google around and you'll find it.