Sorry to bring up this thread again, but I had to ask. In one PC I have a C2D E6850 CPU and 2GB G.E.I.L. DDR2-1066 Kit GX22GB8500PDC, and now want to replace it with Q6600 CPU. Will it be really faster or just use more watt and only become useful after more applications and games are supported?

Also why is the C2D Extreme CPU more expensive? The price went up the last few months while other CPU's got cheaper after the Quad core came out.