Thanks, lilshawn.
I was able to track down another computer in the warehouse and it had an XFX GeForce 7600 GS. Also, on their website I found "System Recovery Disk (SRD) Multiple Games (050-0233-01)" and it had some helpful information in its description.
"System Recovery Disk for Redline Rampage, Frightfearland, The Swarm, NASCAR Team Racing, Aliens Extermination, Twisted-Nitro Stunt Racing, Need for Speed Carbon, Paradise Lost, & Justice League Heroes United. Multi-game SRD supports H61M-P32/W8, GA-H61M-S2PV, SB336-Ni, DH61CR, EL339-b, 945, G31 & G41 motherboards and GTS 450, 650, & 750 video cards."
So it looks like I can confirm 4 different compatible GPUs and that gives me some options. Although, I think there's a typo in the description and they mean GTX?