I don't believe ever released a Quadro with 216 shaders. Still it's kind of disappointing they didn't release the FX 5800 (240 shaders like the GTX 280 and GTX285) since that is really the direct replacement for the previous Mac FX 5600. The FX 4800 (192 shaders like the original GTX 260) is an impressive card, but it still means the Mac Pro is dropping a speed class in it's Quadro GPU option. This is kind of like the 512MB HD4870, which is a mid-range GPU, and not a higher-end performance class GPU like the 8800GT was when it was released. I'm still holding out that Apple will release a true consumer high-end GPU for the Mac Pro like a 1GB HD4890, GTX 275 or GTX 285, all safe single GPU options so Apple doesn't have to go to the bother of supporting SLI or Crossfire.