what model is your HP? i cant seem to find that motherboard online. Does it have a pci-e x16 slot? also how much wattage is your PSU putting out? I would recomend at least a 500 PSU, maybe more depending on everything else inside your computer. also check the dimensions, how much space is available? this is a card that will take up the space of two slots, so is this an option for you? Dimensions are very important cause if it doesnt fit you cant use it!