Phenom 9950 Overclocking

[Titan7171]

No matter what I set ACC to in BIOS, it stays greyed out in AOD. I just downloaded the later Beta BIOS (17/10), another question though is when I can be arsed to flash it

HTT OC'ing is a serious disaster. No matter what I do, 211 was already a no go. 211x14 is just over 3Ghz, I run Prime 95 and at once it reboots out of the blue, no error, no BSOD. But 15x200 (3Ghz) is no problem at all. Quite weird. The same happens when I try to get 3.2Ghz with multiplier only, I even set 1.45Vcore, ACC at +2, +4, auto and disabled, nothing helped. On the otherhand, Im on a 64-bit OS though which of course limits me. I think it's just weird I get this wall all of a sudden since ACC +2 and +0.025Vcore is enough to run 3Ghz on multiplier only. Im fine with 3Ghz though, but it's just stupid to say the least I cant get my HTT so high. I actually wanted 250Mhz HTT so I could run my D9's 1:1 4-4-4, but that's not going to happen now. Ill try 207 8:3 5-5-5 instead then, although I prefer the other setting.

another thing I had problems with on my

14.5x207, which Im testing now, is looking a lot stronger but time will tell. If it's stable though Ill set my RAM to 8:3. Still Im just a bit disappointed to see a relative poor OC after all. It's like >3Ghz is a no go. Im thinking of gathering information on MSR codes to clock per core and also try to get CPU tweak enabled without getting into AOD. I simply dont fancy AOD that much

hmm is you mobo sb600?? when I first started messing on overclocking the htt I also was hitting a wall around where you were, one thing that worked for me was leaving the ht multi and the nb multi on auto by doing this I had finally got up to 245mhz . also if you are not set both the nb and ht multi to the same number dont have one at 10 and the other at 9 or 8. I dont know just some food for thought

ok I see you on sb750 try those suggestions anyway if you havent.

Oh also in the bios I have 2 settings for the cpu voltages cpuvid and cpuvddc when I set them from auto to the first setting one sets to 1.000 and the other to 1.125 by moving one up the other follows at a similar ratio, do you have something similar??