Anybody?

I've double checked the EFI string to make sure that it's correct, and I think it is. I saw somewhere in that it may be something about being only 256MB ram, but I really don't know.

I really don't want to get another card, or have to go back to 10.5.8

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System 1: Gigabyte GA-P35-DS4 MB with Intel e6750 Core 2 Duo w/8 GB RAM (Retail install)
GeForce 8800GT 512MB, Snow Leopard 10.6.2
System 2: Dell Optiplex GX280, Intel P4 3.0Ghz w/3GB RAM
GeForce 7800GTX 256 MB, Leopard 10.5.7 using iATKOS v.7 install (work in progress)