Re-overclocking help

[Wipster]

Hi all,

I recently got some more ram and thought what better time then to have a tune up again make sure its running sweet, included in this was a new BIOS. With the old BIOS there was a bug with the multi and I couldn't set it to above 390 odd Mhz the settings just didn't hold. Well thats rectified now and I can finaly get the bus to 400Mhz so I'm running my RAM full speed with 1:1.
However I have a bit of a problem, at 400Mhz FSB and a 6 multi it boots fine and is stable now when I put it to 7 multi to get 2.8Ghz it wont POST anymore. But the really odd thing is I runs totaly stably at 380 Mhz FSB time 9 so at 3.4Ghz with the same cpu voltage.
I have tried adding two notches to the FSB and MCH lines but still no post at 400 with 7, any ideas?

 

[Wipster]

Just tried over volting the fsb and mch by 0.2 and 0.175 respectivly still no POSTing, very odd what cause no post :/

 

[Wipster]

Found it, the multiplier scaling needed to be turned off now I have it running stabilty at 400, it was going well at 440 at lower core freqs but not at heigher, I think I might be bumping into my CPU limit, ohwell.