This is the NVIDIA SLI multiple - GPU connector that use to link up two identical VGA card.

On the PCI slot connector of the GeForce 6600 APOGEE VE 256MB DDR2 PCI-Express card, there is a VGA out, S-Video connector and a DVI connector.

After removing the VGA cooler, as you can notice that there is four pieces of DDR2 BGA RAM in each row.