thanks for the quick reply

What i have tried so far is 3.2ghz QPI (24x) , 2.66ghz uncore (20x) and 1333mhz memory (10x). Bclk always 133mhz.

I did try up to 1.25 qpi v but still had problems passing linx!

So is it just the qpi voltage i should try to raise to get it stable?