there are four options for graphics in the dell inspiron 6400/e1505. you can get an intel 970 i think, and if you get that there is no way to upgrade. or there are three graphics cards that can be bought for the laptop and can come with it.
there is the ati x1300 which is stock, the ati x1400 which is slightly better, then you can get the nvidia geforce GO 7300 which is the best available grpahics card for this laptop. The nvidia option comes for about 50 dollars.
dell inspiron 6400
windows xp service pack 3
1 gig of ram
1.8ghz intel centrino processor
ati x1300 graphics.
Benchmark: minecraft lowest settings 50 fps.
by the way, its probably better just to go buy a better computer as dell integrated graphics now have more memory than any of these cards.
Seriously, though. I saved up 750 dollars and built a new top of the line desktop, and you can build a really nice amd apu based gaming computer for around 400. cheap as crap.