Alright I've been browsing this site for a while now and a lot of stuff has helped me here so I decided to sign up. Um..I've already asked around a little but I'd like to get the opinions of the peeps over here. I have a dell dimension 9100 and these things have been notorious for being difficult to mod due to the whole dell proprietary thing..I recently bought a sapphire X1950 pro and after opening my 9100 up I realized it came only with a 375W psu. So I went back and ordered a 500W psu...now this thing comes with a 140mm fan and I'm not exactly sure of the stock dell psu fan specifications. The cables for the stock psu are diverted all over the motherboard...but it shouldnt be that big of a hastle to remove...the problem is that I'm not sure if the new psu will actually fit in the case...cause theres this tiny clip you have to push down on to release the stock psu...anyone else here have or had this problem? you think the 500W will fit in? if anyone has the stock dell psu size specs that would help me too...I couldn't find it anywhere. MY video card and new psu should be arriving any day now. Thanks again for the help.