Quote Originally Posted by eSp!s0 View Post
But 500FSB and 1200 ram 333 strap is stable with 1,29VNB and 1,20VFSB, tested OCCT cpu, middle and ram for over 10h each.
And 450 (multi 8) and 1200ram 333 strap is stable with 1,25VNB and 1,20VFSB!?
That doesn`t make sense for me.

I would check Performance level of ram using Memset. Probably find your TRd is 8 for 450 and 500 but at 475 it is 7 (due to different ram divider). Guessing but worth a check. Lower TRd = higher voltage for the north bridge.

The anandtech article is really good at explaining why some configurations require a much higher north bridge voltage. Remember the main component of the north bridge is the memory controller.