Will Corsair Dominator 12GB (3 x 4GB) DDR3 Desktop Memory run with Asus Crosshair IV Extreme ROG Edition 890FX Socket AM3 Extended ATX Motherboard with a AMD Phenom II X6 1100T Black Edition 3.3 GHz Socket AM3 6MB Cache
You can check the ram QVL on asus webpage for your board to be safe. I've had nothing but good experience with corsair dominator, but with 4 gb sticks, sometimes it's safer to go with a tested stick.