Keep in mind that if you bought the PC at the same time as this Mac, you'd likely be looking for an AGP graphics card. While there's new old stock available, ev

Keep in mind that if you bought the PC at the same time as this Mac, you'd likely be looking for an AGP graphics card. While there's new old stock available, even if you can find a 2007 HD3850 it's not really much of an upgrade.