So I wanted to gut my HP Slimline S3123w and transplant in into a larger case. I had an spare Radeon HD2900xt laying around, and nothing to use it in. So I gutted both the Slimline and the server I have, and stated my build. I ran into a snag with the atx power connector on the Slimeline's motherboard. It's one of the mini atx connectors and my psu in the server would not work with it. So my friend Aionsilver and I decided to cut the connector off the psu in the Slimline and splice it to the full size atx psu. Pics as follows.