hmph, looking at those specs, does your board have an agp slot?
Also, to take advantage of a G4 ti 4200, you might want to upgrade the board and cpu, and maybe the power supply.
A quality 350 watt ps should be good enough. Ask the folks here about more details on this, as Im off to work.
Of course my motherboard has a AGP slot. Its impossible to find any geforce and up that isn't an AGP card because pci can't handle the new technology and i have a 400watt power supply which is pretty useless too and plus agp been around since 98'ish and i don't think AMD Althons are that old... probably the PII and K-6 phase