Would performance of a CPU decrease if ...

[lavaheadache]

my guess is that your CPU is toast. I'll take it for $20 shipped.

 

[imported_SilentBobi]

After the complete reinstall and bios and driver update. My default 3dmark05 score is 7575, with gpu overclock its 7996. It's just unbelievable!
You were right Leper Messiah. It's nothing to do with bent pins.