If that is your motherboard, then you can only use PCI graphics cards. You really can't get much performance out of PCI as the bus is too low bandwidth for modern graphics and the fastest PCI card out there is an X1300 PCI
Well, the cards you could get would be fine for 2D applications and movie watching, but don't expect to be doing any recent games on them at decent settings, especially with the fact that the CPU and ram that would be in a computer that age are very weak also.
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