The t6212 has a standard atx power supply so you can upgrade it. I put a thermaltake 450w in. I also put in a geforce 6600gt card and a gig of kingston ram. The ram that comes with it is single density, so if you get double density, you'll have to drop the ram that it comes with. I flashed the bios with ver 3.4 from msi website. Unlockes some of the features, but beware, it will give a blank screen if you set the fsb to 1000 from 800. Warning flashing the bios will void the warranty from emachine. Overall its the best emachine ever built. I plan on running some benchmark test soon.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic