I have a bunch of nubus video cards and they just work but all had driver disks I am sure. What OS are you running? I know I had to recap my Apple branded cards for them to work, but I don't see any caps on your board that would be suspect. Both the the 650 and 700 should show the card as the second monitor since they have on board video. Does the VGA adapter would on the onboard video with your machines? If it does its settings should plug right into that card and work. Like most video cards it should work with basic video even without a driver. There is always an exception to that but generally speaking they do I have found. At 12 years or more old it is possible the card may have died. Good Luck.