I have a Vostro 400 mini tower that has the stock 300 watt Lite-On PSU. I have an 8800GT video card in there now and would like to move up the video card food chain some. I am thinking that the PSU is probably close to being maxed out and am thinking it will need to be upgraded as well if I am going to power a bigger GPU. Is the Lite-On PSU a standard size? Can I install an after market PSU and have it fit in there? I was thinking of the Corsair 450 Watt unit.

Thanks,

Bob