On my 9950 140w chip, I have been playing with higher NB and this stress test. I found so far, running 3.2ghz CPU and 2400mhz NB, I will fail all but one pass. No matter what i did voltage wise to NB MEM or CPU. Now, if I bring HT from 2000mhz to 2400mhz to match the NB, I will pass all. It has been consistant. I wonder if AMD makes the HT and NB the same for this vary reason?,...just thought I'd pas this on incase it is relavent.