Hey guy's. I own a Dell Optiplex 390 SFF machine, i3 2021 3.3ghz processor. however, it has a lousy psu - 240W. I was planning on buying a ASUS 6570 Radeon HD 1gb low profile card, but was put off by the required PSU. Yet, I know these are exaggerated at times. Also, I know that with it being a small form factor case, its going to be a adventure finding a PSU compaitable, and dont have the skill nor money to buy a new case, then fit it. So my question is would my current PSU be able to withstand the 6570, if I disabled the card whilst I wern't playing games, then when playing games I enabled it. Please reply in a easy to understand fashion guys. thankyou.