YES YES YES UPGRADE IT! Otherwise you're putting your card in great danger, undervolting it is VERY bad. I've heard from many people who have had 300w PSUs or less, once it even killed a guy's Ti4200 (Agissi, that was todd!). I don't know what you're talking about agissi again, a good 400w or more PSU easily beats whatever you've got running, get a TTGI (great PSU!) 420, or maybe a PC Power and Cooling (best, expensive tho) 420 or what I have, Antec (best bang for the buck) TruePower 430w. Trust me on this one...