Quote Originally Posted by s3rv3r View Post
I want use my E8400(c0) with 4.0GHz ( 8 * 500 ), but wich tension is recommended for use in VFSB, VPLL, VNB, VSB ? My bios is 1406
Try this.

VFSB 1.4
VPLL 1.56
VNB 1.4
VSB 1.4

I have the same bios version and am running my E8600 @ 500 x 9.

You have room to tweak these a bit more, I haven't taken the time to do it since it runs stable with that and my temps aren't bad. Maybe one day I will tweak it a bit.