I recently Purchased a new Graphics Card for my Dell Dimension 8300, The manufacturer recommends a PSU of atleast 500W. The PSU i currently have in my 8300 is only a 250W. I purchased a 600W PSU and I assumed that the PSU would fit in my 8300 case considering both were ATX. This was not the case. The AC port on the PSU didn't lineup correctly with my Cutout on the back of the 8300 Case. So finally to the Question. Which after market PSU's of at least 500W will fit in the Dell Dimension 8300 Case? Thanks in advance for any help.