The nforce2 is the best AthlonXP chipset, it supports DUAL DDR 400 . Thats 6.4 GB/s as much as an Xbox, more than most graphics cards . It gives a 25% increase in speed in 3d rendering but only a 3-4% speed increase in gaming .
The KT400A is one of the better chipsets, rock stable, decent speed and DIRT CHEAP , you can get one for around 58USD and it supports BARTONS and DDR 400
a geforce 4 MX 440 integ is faster than the real thing with dual DDR 400