|The Dell Dimension 2400 has 3 PCI slots & no AGP slot:|
The choices in PCI video cards are slim. When looking for cards, make sure it states that the memory is 128-bit...64-bit cards are about 40% slower. 128-bit is a selling point & is usally listed in the product description. If it's doesn't say, it's probably 64-bit. 128MB is fine, 256MB isn't necessarily better. And get a card that supports DirectX 9. All those requirements will severely limit your choices, but here's a couple of possibilities:
FX5200 128MB/128-bit at $59:
FX5500 256MB/128-bit at $83 (currently out of stock):
If I knew for certain that this FX5200 256MB card for $52.50 uses 128-bit memory, I'd say it'd be the best deal, but it lists the memory as 64/128 bit memory?
This space for rent