FYI for your head to head
E8400 @ 3.6ghz
4GB 6400 @ 800mhz
Very nice! I sit at 1.225 bios, 1.20 CPUID at 400mhz or 3.6ghz. However, for 4.05ghz or 450mhz I need 1.39v. I like the 1:1 @ 400mhz for the memory though. Very solid overclocker!
Beechmunky: If you compare a E8400 to E7200 at 400mhz the E7200 will be 3.8ghz while the E8400 is 3.6ghz. I would still bet that with the added cache of the E8400 that it will be slightly if not much more faster than the E7200 @ 400mhz. Your talking 3mb compared to 6mb.