While we're still waiting for Mac Pro's to get Sandy Bridge here's some interesting info i haven't read before. Apparently Intel lets you overclock Sandy Bridge to 4.5 GHZ (!) with standard air cooling.
Read article: http://develop3d.com/blog/2011/01/I...-the-game-for-the-entry-level-CAD-workstation
Read article: http://develop3d.com/blog/2011/01/I...-the-game-for-the-entry-level-CAD-workstation