Miyamoto1952 on 29 December 2008
I found a 4550 for $60, this is a list off all neweggs low profile/ low profile ready cards. As to your power supply if your is a standard size it wont cost but $30-40 to upgrade to something more then sufficent. The problem you may have is dell loves using propritary stuff so alot of times they will have normal size power supplies but the screw mounts wont align in any shape or way.
http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=2010380048%201419530408&bop=And&Order=PRICE
