I don't think thats a good graphics card on the dell D420 but I don't know.
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That laptop would blow my socks off. 2 nvidia geforce 7900 in sli, 1gb of ram, and a 19" lcd. Now that thing owns.
There is no way i could afford it though.
Ouch that looks like crap, and probably gets about 30 seconds of battery life.
I can think of alot better ways to spend $4000, even on a laptop