A:AnswerThe card should work, seeing as the hp p71147c has the 1 PCI-e x16 slot, and a 300w power supply is the minimum for that card, i'm also using a 300w psu and i have this card working now.
A:AnswerPurchased from Amazon online and it shipped fast. Best price in town and it matched Best Buy's price. Great product. I have 2 of them. Amazon has them in stock.