Is there a way to use an agp video card with a pci-e motherboard? Like an adapter or something?

I have an nVidia geForce 5600 ultra that I used with my eMachines until the comp died. Now my new computer (gateway) only has a pci-e slot. Can I still use it via an adapter of some sort? I'm guessing that I'll need to buy a new card, but I thought I'd ask :)

Thanks!
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