Actually, there are 4.
Version 1 with an ATI 7XXX series chip (Top Green Board, AGP). 2 vga connectors
Version 1 with an ATI 92XX series chip (The two blueish boards, AGP) This one I believe only had a vga connector.
I believe all Version 1 boards had 64MBs or at least most of them did.
Version 2 with an ATI 92XX series chip (Red board AGP), has a DVI and VGA connector.
Version 2 with an ATI 1050(1550? ) (Orange board, PCIe), has a DVI and VGA connector.
Note: I didn't count the svideo connector as a connector in the above.