Gigabyte has come up with a very interesting alternative to the dual card SLI option; what they've done is placed two nVidia GeForce 6600GT cores and two sets of memory onto a single videocard PCB! Like a regular pair of SLI compatible cards, the two individual cores split the PCI Express 16x bus and each core gets a direct PCI Express 8x connection to the rest of the system though one standard PCI Express x16 slot. Each of the GeForce 6600GT cores on the GV-3D1 are supported with dedicated sets of 128MB of Samsung GDDR3 memory each, for a total of 256MB GDDR-3. The GV-3D1 has its cores clocked at 500MHz apiece, but the memory runs at 1120MHz - a full 120MHz over stock speeds. We'll see later what kind of performance benefits this can produce.