The latest Version, 1.0-9755, of NVIDIA graphic drivers for linux was released with support for Quadro FX 4600 and Quadro FX 5600 and for NVIDIA SLI with GeForce 8800, Quadro FX 4600, and Quadro FX 5600. Download links within.
1.0-9755 NVIDIA Accelerated Linux Graphics Driver Set for Linux/x86.
1.0-9755 NVIDIA Accelerated Linux Graphics Driver Set for Linux/x86-64.