Like I said I'm not worried bout the power supply. Worst case scenario I just wire up a full size power supply externally. What im worried about is the motherboard not supplying the full 75 watts to the connector because it supposedly has a 25w limit on the small form factor motherboards. It has a i5 2400 in it right now and just integrated graphics so I know the power supply still has plenty juice left, i think its rated at 260w but I'd have to look it up again if been considering this for like a year just never had the extra cash. Worst case scenario I should be able to return the card if it doesnt work. I know some hp prebuilts can only be used with specific cards that are options from the factory because they lock out the ability to use any card you want for some stupid reason, I think so by people dont warranty their PC when the power supply busts from being overloaded. If it doesnt have a limitation on the motherboard like that and there just saying it cause the undersized power supply then it should work fine. I just dont want to buy a graphics card and be stuck with it if I cant use it in this system.