I'd like to upgrade the graphics card in my HP m8100n without replacing the power supply. The computer comes with a 300W psu, and the card I'm looking to get says you should have 350W to run it. I called XFX and the tech guy told me it would probably run OK since it is close to 350W, but that he couldn't guarantee anything. I've found a few reviews online from people who have run this card on 300W and say it works great. I'm just wondering what possible problems I could run into if I get this card. Will it not run properly? Is there a possibility of damaging my computer? Any help would be appreciated.