Jim:

Regarding the 335fsb I edited my post above, please read.

Turns out it was a e6600 not the e4400, I brought 2 exact systems (for me and cousin) and as I was assembling them together and doing the move at the same time I screw up on the processors.

e6600 max was 335fsb.
e4400 max unstable was 315-319fsb

e4400 at 315fsb gives instant errors os orthos cpu stress (10k fft).