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Phenom II BE 720 2.8 stock questions

post #1 of 12
Thread Starter 
i have to ask a few questions to get this cleared up

i have been using the cpu multiplier to OC my Pe II black edition X3.
am i doing this properly.. its stable under prime 95 for 12 hours at 3.2 at the moment, but in all the videos am i supposed to use the FSB that starts at 200mhz to OC... so confused over this lol

thanks for helping a noob once again everyone
post #2 of 12
Quote:
Originally Posted by dustin88 View Post
i have to ask a few questions to get this cleared up

i have been using the cpu multiplier to OC my Pe II black edition X3.
am i doing this properly.. its stable under prime 95 for 12 hours at 3.2 at the moment, but in all the videos am i supposed to use the FSB that starts at 200mhz to OC... so confused over this lol

thanks for helping a noob once again everyone
Yes, you're doing it perfectly right.
There are 2 types of overclocking - with multi (only for BE CPUs) and with ref.clock.
Each has its advantages.

OCing with the multi ensures you reach high OC before any instabilities occur, because it's not limited by RAM or NB. + it's way easier.
On the other hand, it is not accurate. You can only increase freq by 200Mhz, which is quite large steps.

OCing using the ref.clock is more accurate, and it also speeds up your RAM and NB. However, it can lead to harder to achieve/smaller OC of the CPU itself, due to RAM or NB limitations, + the hassle of changing RAM, HT and NB multipliers all the time.

BE CPUs are meant to be OCd using the multi, but a combination is always better. Once you achieve max OC using the multi, raise your ref.clock, so you will both overclock your RAM and NB, and reach the "real" max OC of the CPU
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post #3 of 12
Thread Starter 
=D thanks for the fast response +rep my good sir
post #4 of 12
What he said
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post #5 of 12
Best to use both, and have you tried to unlock that chip to an x4 yet?, your MB is good for it

I'm currently running

308x12=3696MHz CPU @1.48....

308x9=2772MHz CPU/NB @1.485.....

set my RAM to 1648 (they are 1600)

308x7=2156 HT link

but I had to add lots of volts for all that

The main thing I went by, was choose the highest FSB that lets me get a RAM speed a bit more then their default speed

Then see what that means for the CPU using its multiplier, and run stablity test

then see what the CPU/NB could do and and be stable


and then find the best balance of all that with different FSB



If you really want to OC, thats a good MB for it, added extra volts and all

Just keep a log off as you go, it didn't take me long to find the stable limits of my rig at all kinds of different combos
Edited by Mit Namso - 5/20/11 at 9:26am
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post #6 of 12
Thread Starter 
thanks again for all the fast advice. i have tried to unlock the 4th core... multiple times.. it will post but i cannot get into windows. and it jsut locks up, i have tried combos of voltage.. and even under clocking it. but i believe its defective. i followed a lot of different guides to try. and since i have BIOS 3303 i can even jsut press 4 when loading and it is supposed to automatically do it. and when it reboots it does say the 4th core has been unlocked. but i cant get it stable for some reason, witch is a bummer
post #7 of 12
Quote:
Originally Posted by dustin88 View Post
thanks again for all the fast advice. i have tried to unlock the 4th core... multiple times.. it will post but i cannot get into windows. and it jsut locks up, i have tried combos of voltage.. and even under clocking it. but i believe its defective. i followed a lot of different guides to try. and since i have BIOS 3303 i can even jsut press 4 when loading and it is supposed to automatically do it. and when it reboots it does say the 4th core has been unlocked. but i cant get it stable for some reason, witch is a bummer
I feel your pain. Same case here, except I can't even post. Anyway, for me I think it's the mobo, because even if I explicitly enable only the first core, which works 1000% (yeah, I missed 1 math class back then ) , it still won't post.
So I guess I jsut need another mobo As of you, I don't know. Can be defective in both cases.
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post #8 of 12
You are doing it just fine.

Just keep on raising the multiplier and test with Prime95, recording your speed and vcore voltages along the way. Raising the Bus speed will give you a better overall overclocked system though.

Find the max OC on your processor with the multipliers. After that, back down the multipliers and start raising the Bus speed 10 MHz at a time and testing. Change your Bus/Memory ratio from 3:8 to 1:2 so that your memory stays stable. Lower the HTT multiplier while overclocking to ensure that the HTT stays at stock 2000MHz. For whatever reason it performs best at stock and worse overclocked. Make sure you use a software program like HWMonitor to monitor your CPU temperatures while stability testing. You want the temperature to stay below 55C, if it hits that mark you will need to get a better cooling solution or you have just found your max stable overclock.

When you become unstable and you are at your rated vcore that you were stable with using the multiplier instead of the bus speed, that means you most likely need to raise the NB-CPU voltage... If that fails to work it could be your memory and you'll want to back down the ratio even further to 1:1 for now.

Once you get your Northbridge to its limits (it normally tops out at around 3000MHz), raise your CPU multiplier (if needed) to bring your processor clock speed in line with your previous rated max cpu OC and vcore voltage.

After all of this... Now we work on bringing the memory ratio back up from 1:1 or 1:2. Try 3:8 and run memtest to check for stability. If this does not work you have two options:

1. Lower the Bus/Memory ratio until it becomes stable.
2. Work on overclocking the memory by raising voltages.

You might need to do a combination of both lowering the ratio a bit and raising voltages to find your best stable memory overclock.. Usually memory OC tops out between 1600MHz and 1866MHz.

Memory speed can be found this way:

In CPU-Z, check the memory tab and see what speed the memory days its frequency is. Multiply that by 2 to find out the memory clock.

Example: 800MHz frequency * 2 = 1600MHz speed RAM.

Once you find your maximum memory OC, you are finished! You might need to raise the vcore one more notch to stabilize the Integrated Memory Controller on the processor but this is not always necessary.

Good luck!
Edited by Talon95 - 5/20/11 at 12:50pm
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post #9 of 12
follow talons advice. its 98% what i was going to post.
dont get dicouraged if you top out at 3.4-3.5 with the multi alone. you may be able to fine tune a higher than 3.6 using the bus later.
i limit myself to 1.45v on mine because of my board. highest multi clock is 3.4 and i can hit 3.5 combining the reference clock and multi
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post #10 of 12
Thread Starter 
just using the multiplier and not touching anything else, im stable at 3.2. and my memory is at 1077. i haven t touched anything else yet. but trying to get my memory to run at 1600 like the stock clocks SAY it should run has been hell. i have tried everything, even setting the timings voltage and whatnot still it will BSOD when i hit windows. that's my biggest frustration. at the moment im using a stock cooler until i rebuild this pc when bulldozer hits. but the memory never preformed as it should. everything else always seemed to run great
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