I have a Dell Optiplex 980 small form, 8gb ram, i5@3.2ghz, and just ordered a new graphics card. The cards minimum wattage is stated at 400w, but reviewers of the card say that is works at 230-250 as well with no problem. My psu is at 235w and wondering if I should upgrade before I put the card in or see how it works out. I read that the most my computer can handle is 300w and a recommended item was this. Input and suggestions are greatly appreciated.