Question : Problem: Does Auto CAD use the all 4 cores of the Q6600

Would Auto Cad 2008 use all 4 core of the Quad Core Q6600

or would it be better off getting the Intel E6850 instead cause of the faster clock speed if Auto Cad only uses the 2 cores of the Q6600 ?

Answer : Problem: Does Auto CAD use the all 4 cores of the Q6600

All AutoCAD versions since 2002 (2002, 2004, 2005, 2006, 2007, 2008, etc.) are fully multithreaded, so will use all of the cores in your quad core Q6600.