Phenom II 720 Help

I've heard that these things can do 3.3ish with stock settings by just raising the multiplier.



Right now I'm playing around with AMD overdrive just to get a decent indicator or ranges before I input those settings to the MB.

If I take this thing to 3.2 (16x) and start to stess test with OCCT if fails very quicky. It reboots (no blue screen visble).

Temps are really low like 31C max right now under load.


This board
http://www.newegg.com/Product/Prod [...] 6813157154

Along with a 720BE and 4 Gig of ddr2 800 ram is being used.


All I'm doing is bumping the multiplyer.


What am I doing wrong?

Strange thing is I can bump up to 3.7 fairly easy using AMD Overdrive but the seconds I stat any kind of stress test it crashes.


Could this be related to Vista 64 or maybe Some bios feature?

Seems like I'm going to be stuck at 3.3ghz (16x) at 1.4v

17x produces a BSD shortly after starting stress tests even with vcore bumped to 1.45.


I just cant get anything higher than this. I have noticed that according to OOCT my vcore will swing +/- 0.03 randomly up and down as I'm testing.

Could this be the root of my issues? Is this normal or the sign of a sub par power supply?

I've had this ram for a while now and never had any issues at all. I think I've ran memtests before on it and its come back fine.

Since its just a mult overclock the ram should not be causing an issue right?

Temps are fine, between 33-35C under load according to a few monitors. Its that xigmatech 1200 something cooler.

What types of peripherals could be causing issues? either way i don't have anything strange connected besides the standard monitor, mouse, keyboard and speakers.


ACC is set to auto. I was under the impression that is what you want unless you're trying to unlock the 4th core.

Its on manual and and the lastest roun of OC is all bios based.

Dude i have the amd 7850 BE and i cant change my multi at all, but i can raise my bus speed, its default at 200 and i can get it up to 222 completely stable, now i took my 2.8 to 3.1 and thats without even moving my multi, now i am confused cause i cant change my multi at all, so its my problem but i would mess with the clock a little just to see if it bumps up more! this is fun, lol

No really there is no benifit for it being on at all. It is said that it helps but in my experience here and at work and at home and on friends it really doesnt give beter results at all. More times than not it causes problems- Example on a PII 940 Im able to get an OC of 3.825 Ghz with it disabled with it enabled I get a max OC of 3.725Ghz not to mention the temp monitoring problems it has when its on. Example with ACC off my temp monitor says 32 Idle with it on temps say -265C. Another reason is its really for major overclocks past 4.5Ghz where instability is a real problem and you will be cooling with LN2 or Phase change or such. TURN IT OFF!!!!!

Turn it off. The PII has built in what ACC does for the PI. I have this chip too, and mine becomes unstable (may not even POST) with ACC on Auto. Left off, it is as smooth as silk.

Ok so I've been playing around with my stuff todafy for a fwe hours with ACC off. This is what I've found.


14x*210 stable at 1.325v (stock v)

15x 210 sable at 1.3625v which is something like 3-4 bumps
15.5x 210 stable at 1.4 so another 3-4 bumps.

I tried 16x 210 but it fails quickly at 1.425v (specified max)

It would take me at least ~1.44 to get that stable and that just seems like its not worth it or right.


Oh well I'm not sure what I did wrong.


It might still be the power I guess (PS or bad local power). I'm not sure what acceptable vdroop levels are but at 1.4 I'm seeing this swing between 1.375 and 1.43 in CPUZ

I'm scared of siginficantly damaging the processor having it run outside the spec range. I'd hate to ruin it.

I understand that there is always inherent risk in OCing but obviously the AMD specifies the max recommended voltage for a reason. I'd hate to be that guy that burns out his chip in a couple of months for a few mhz more.

Is there any easy way to explain why Ram would make a difference? I did not realize Ram would be a factor with overclocking the CPU. I myself am having trouble getting over 3.5Ghz on my Phenom ll 720. ( I'm using 1066 Kingston Hpyer X ram, so that shouldn't be a problem)