Some D9GMH sticks are even better than D9GKX but good D9GKX can be really great, as always YMMV depending on the RAM stick samples and motherboard, either D9GMH or D9GKX should yield a good result anyways. I wouldn't be the least worried about picking D9GMH over D9GKX, it's not a garantuee the D9GKX will be better.