Quote Originally Posted by kimandsally View Post
Thanks

tried this;
C1E/EIST off? Have you tweeked the nb and sb voltages? i.e.:

NB Core 1.2V 1.5v
NB PLL 1.8V: 2.0v
NB PLL 1.2V: 1.38v
NB PCIE 1.2V: 1.34v
NB core 1.2V convert from: 2.14v
SB core voltage: 1.34v

Also have the strap to 300 also tried 333

Thinking that I might try the Asus maximus
The key for quad core overclocking on this board is tweaking the GTL reference voltage settings:

http://sg.vr-zone.com/articles/DFI_L...w/4409-17.html

Personally I had the best success using 160-160-160 for the GTLs and tweaking vtt voltage. With those settings I was able to get 390 fsb stable (x8 multi) on a qx6700. Never could get stable at 400+.

I expect the Asus maximus would get you higher quadcore clocks with less work. The P5K Deluxe will easily take a quad to 450fsb +.