|Your CPU support list:|
"Core 2 Duo E4400 (2.0GHz,800FSB,L2:2MB,65W,rev.L2) 2.01G
"Core 2 Duo E4400 (2.0GHz,800FSB,L2:2MB,65W,rev.M0) 2.01G
"Core 2 Duo E4600 (2.4GHz,800FSB,L2:2MB,65W,rev.M0) 2.01G
You need version 2.01G motherboard and BIOS version 1903 for full support. If you have an older version of the motherboard,you might not get any better, even with the latest BIOS version. Sorry.
You have to be a little bit crazy to keep you from going insane.