PNY Quadro Plex Model II

2x PNY Quadro FX 4500x2, 2GB (512MB/GPU), 8xDVI (8xDual-Link DVI)

PNY Quadro Plex Model IV

2x PNY Quadro FX 5600, 3GB (1.5GB/GPU), 4xDVI (4xDual-Link DVI)

PNY Quadro Plex S4

4x PNY Quadro FX 5600, 6GB (1.5GB/GPU)