Dell XPS 8300 Power Supply Replacement

[Holypsycho]

Hey everyone, I have a Dell XPS 8300 and I'm looking to replace the stock Radeon 6700 with a GTX 770. In order to do this, I need to replace the stock 460W PSU but I cannot seem to get the one in there out.
I took the 4 screws out in the back but there seems to be something else holding it in. If anyone has any experience with this particular model, can you give me a couple pointers? Thanks!

 

[PP Mguire]

Look for screws holding the top or bottom in. Otherwise it might just be snug.

 

[DistraughtSysop]

I hate Dell cases - they're really not designed to be easily upgraded by the end user, although more recent designs aren't quite so bad.

Check to see if there is some kind of a retaining clip holding it into place; IIRC, the last XPS I worked on had a clip that was really just a small plank of metal sticking up from the case that you had to push down on to let the PSU slide out. I didn't see it until I really started looking for it.