Hp is different. The oem boxes don't come with the same ram adjustments as your regular asus board. You have more options. Just be sure to use the right ram slots; you only have two ddr3 slots; the others are for ddr2; if you try to force ram into the wrong slot, it will damage it. download your board manual off the asus website if you don't have one. It will tell you which slots to use; yours are color coded, so it's easier. Just use a matched pair of ddr3, non-ecc 1.5v, and you should be fine. Crucial is a very widespread used brand.