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AMD Overclocking Queries

post #1 of 26
Thread Starter 
Hey guys, I installed a Hyper 212+ with push/pull AP-14's today and want to push my currently modest overclock but I was curious as to the best way to do this. I'm hoping to hit 3.5-3.8.

CPU: Phenom II X3 720 Black Edition with the 4th Core unlocked
Mobo: Gigabyte 870a-UD3
Ram: G.Skill Sniper 2x4GB DDR3-1333mhz

To get it to 3.2ghz I raised the multiplier and bumped the voltage a bit but is overclocking the multiplier the best way to go? Would it be better to OC via the multiplier, fsb, or a combination of the two?

Also, throughout this process is it worthwhile to overclock my Northbridge as well? Is there any steps I should take to ensure stability? I turned off Cool & Quiet.

Thanks for the help guys.
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post #2 of 26
The snipers won't help due to 1333Mhz memory often holding back overclocks, though this may not be a problem with your black edition processor. You should OC via multiplier, though do note that sometimes a high multiplier (i.e. 20X) may be unstable, but you can reach the same CPU speed by using a lower CPU multiplier and higher ref. clock. With that RAM don't expect to be able to push the ref clock that far.
post #3 of 26
Thread Starter 
Thanks.

Is there any merit to altering the N.B voltage or otherwise overclocking the Northbridge?

Also, should I stick to manually adjusting voltage or is auto also an option?
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post #4 of 26
Yes, huge merit. It opens up all that bandwidth between CPU and RAM and makes a huge difference. Always use manual.
post #5 of 26
Thread Starter 
Splendid.

As far as Northbridge overclocking goes, should I see how far I can stably take that before experimenting with my current overclock? And is there a generally-recognized voltage max for the Northbridge?

Also, would you stress-test the northbridge the same as you would for the cpu? Prime95, OCCT, etc.
Edited by Siegfried262 - 1/27/11 at 11:42pm
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post #6 of 26
The NB also adds stability to a OC, at 4.5ghz my system will not be stable unless the NB is at 2300mhz. Back to ur NB voltage question, I've heard many different voltages being thrown around, some say 1.2v other 1.35v.

I personally use 1.24v stock is 1.17v or something or other and yes you stress the NB the same...use prime 95 or OCCT or amd overdrive, which ever you prefer. Unless there is some program that stresses the NB alone but i've never heard of it.
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post #7 of 26
Thread Starter 
Really appreciate the input.

Been doing some googling and just want to make sure I have the right idea.

Should I find my Northbridge max and then see where my multiplier can take me? (Whilst stress testing and watching temps of course after each incremental bump)
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post #8 of 26
I usually find my max stable overclock first and then up the NB untill it can't take no more...In my case the sweet spot is 3.85ghz CPU, 2600Mhz NB
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post #9 of 26
Quote:
Originally Posted by Grobinov View Post
I usually find my max stable overclock first and then up the NB untill it can't take no more...In my case the sweet spot is 3.85ghz CPU, 2600Mhz NB

Yea go for your highest stable overclock first, then start increasing the NB speed and i would also put an idea foward, find the highest oc then the highest NB speed, then if you want try increasing the clock speed again and see if you can go higher as i said before, i would have never known if my chip could reach 4.5ghz unless i upped the nb to 2300mhz before i thought the limit was 4.3ghz.

So i got an extra 200mhz just by increasing the NB.

Just keep trying different combos and see what works best for what you need it for....take my chip 4.5ghz is fast, but some how it is not enough i want 4.7ghz now lolz keep pushing it to the limit i say.
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post #10 of 26
Thread Starter 
Thanks for all the advice

I feel far more confidant in overclocking my processor which I plan on doing so tomorrow ^^ (Or later today really >.>)

+Reps all around.
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