NVIDIA issued five products with the Quadro 4000 has 2GB of GDDR5 memory and 256 stream processors (SP). Also, the Quadro 5000 has 2.5GB VRAM and 352 stream processors, whereas the Quadro 5000M, for mobile workstations, boasts 2GB GDDR5 and 320 SP. The shader processor count hints to the GF104 GPU being used, which is the latest update of Fermi running in the GeForce GTX 460 as well.
Then in the more powerful segment a GF100 silicon wazs used as the Quadro 6000 has a good 6GB graphics memory (!) and 448 stream processors. And then get this, the Quadro Plex, the most powerful by far, with a massive 12GB of memory and 896 SP -- obviously empowered by two GPUs.
"We have built engines like AXE to enable the creation of next-gen applications. When you couple these technologies with our Fermi architecture, the result is a new Quadro family that's exponentially better than anything the market has ever seen " said Jeff Brown, general manager, professional solutions group at Nvidia.