thats a good motherboard or a lucky chip with no fsb wall.
That 8x mulitplier sucks usually.

I used to have an e8400 on a 650i,
I see that you're running close to max vcore. 1.35v.
If you dont hit the wakll you could hit 4ghz, but the core2 doesnt see any benefits once you're over 3.6ghz.

Still impressive overclock fella.