http://www.google.com/search?hl=en&q=dell+...G=Google+Search don't be fooled by marketing also why were you looking at Dell Systems?
if you want good parts I'd suggest not to the following components Dell uses are Crap Motherboards: Crappiest things ever, no OCing, ---- chipsets. Their INT GFX and INT SOUND are Garbage, many lack AGPm or PCI-e ports, ask around here ther ae a lot fo people who were f'ed over. Ask BTK. Power Supply: there's a reason why more OEMs fry... and shut down/restart randomly CPU FAN/Heatink: Pure ----, don't even want to go tehre Case: it looks pretty, but the bottom flip thingy is poorly made and needs to be removed(hey ncase looks ugly after) and it blocks access to a USB port and the audio jacks.. Also airflow is utter crap Net burst processors: they can't be overclocked, they are overpriced and they under perform given their cost. The design is old and considered obsolete. Want a 3.0GHz Pentium D... guess what, that 1.8 GHz Core 2 Duo Outperforms it royally... Even the 1.8GHz Athlon x2 does...
Right.... Dell is not talking about their computer PWNING... but ATi's card PWNING. It does just that, I have an XTX.