Many retailers are proclaiming that this card requires 400w or 450w minimum for it's compatability, however, many people have told me that it (the card) works fine on 300w psu's. It's max watt (TPW) is 55w. The card should be coming in very soon. Will it be an easy installation w/ my pc?: http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&dlc=en&docname=c03135882