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Overclocking Phenom II x4 840 - Page 2

post #11 of 19
Quote:
Originally Posted by Delicious View Post

Occt itself will blue screen as well.... Man your CPU at 4.6ghz, that's just a dream I wish to accomplish....

If you wish to gain an understanding of the V-droop the board has- try running OCCT at stock or only slightly overclocked to see how much the voltage changes from idle to load. It will give you an Idea of what you need to set it at to maintain stability at a given speed/load. Also, make sure that you have good airflow over your VRM's on the motherboard - it makes a HUGE difference in temps smile.gif.

I'm guessing that at load you will only be giving the chip about 1.42 volts when set at 1.48 accounting for the vdroop. That's just not enough juice for stability programs at that speed.
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post #12 of 19
Thread Starter 
At 3.6ghz, the vdroop is from 1.440 to 1.376. However majority of the testing the Vcore stayed around 1.420-1.430.
At 3.8ghz, Vcore was set to 1.476, however during the test it would go over the limit and sometimes hit 1.50, then crash.
At 3.8ghz, Vcore set to 1.546, voltage would go up during testing to 1.57 at most.. But it didn't crash.

Oh crap lagged a bit and clicked post multiple times...how do you delete posts?
Edited by Delicious - 3/11/13 at 4:29pm
post #13 of 19
It's really up to you, but you will need to give it some more V core if you want to pass the stability programs at a given speed compared to playing games etc. The chip should take it, if you keep temps cool. The board may be more at risk , especially if you don't have active cooling on the vrm's.
You may also try bumping up the HT voltage a bit. Just something to try.
As for the Vdroop, you pretty much have to go off the maximum droop it displays at load vs your setting. If i read what you have posted correctly, it's nearly a .1 V droop - which is pretty hefty. Do you have a graph from OCCT showing your Vcore during testing?
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post #14 of 19
Thread Starter 
Okay I set it at 4.0GHz and Vcore set to 1.606 without crashing. It wavered between 1.576 and 1.640.
As for temps, max CPU temp was 49C, and I was wondering if you can look at the other temps to see if they are safe.


As for the OCCT Voltage chart here it is,
post #15 of 19
That's really not a long enough test to see what temps will do. Keep the CPU in the lower 50's C and you should be fine.

Also that is plenty of voltage, as AMD recommends 1.55 as a max for those chips. However your board is probably more at risk than the chip is. As with anything you do, make sure you are willing to accept the consequences before pressing on.

Running stability programs is rough on equipment,much more so than normal usage. If all you need is stability for gaming , then you probably won't need that much voltage to run @ 4Ghz.
I would start at a lower clockspeed and voltage and work my way up slowly to whatever your goal happens to be, watching temps on the chip and board.
Good luck smile.gif
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post #16 of 19
Thread Starter 
Hmm, thanks for your input, really helpful. Learned a lot, especially the Vdroop..

As for the test, I was happy that it even ran for 50 seconds, as it will always crash before 10 seconds.

So you would recommend running 4.0Ghz at 1.55V, for just uses such as gaming? Or would you suggest any other lower voltages that will still work beautifully for gaming and normal usage? Some of the most intensive games I play, are probably ARMA 3 and Total War.

+1!

Also in all honesty, I had my CPU running at 70C idle and it would jump up to 90C under 50% usage for a few months. Just recently replaced my liquid cooling system with the Hyper Plus, and it decreased the temps dramatically.
Edited by Delicious - 3/11/13 at 5:40pm
post #17 of 19
Quote:
Originally Posted by Delicious View Post

Hmm, thanks for your input, really helpful. Learned a lot, especially the Vdroop..

As for the test, I was happy that it even ran for 50 seconds, as it will always crash before 10 seconds.

So you would recommend running 4.0Ghz at 1.55V, for just uses such as gaming? Or would you suggest any other lower voltages that will still work beautifully for gaming and normal usage? Some of the most intensive games I play, are probably ARMA 3 and Total War.

+1!

Also in all honesty, I had my CPU running at 70C idle and it would jump up to 90C under 50% usage for a few months. Just recently replaced my liquid cooling system with the Hyper Plus, and it decreased the temps dramatically.
You had a 40c drop from changing coolers? Sounds like it was never mounted properly to me...... I have my phenom ii x4 960 o/c to 4.1...just gotta dig it out of the closet and check settings.....be back soon
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post #18 of 19
Thread Starter 
I figured the liquid cooler was broken, it is about 2 years old. I re-pasted the thermal twice and nothing came out of it. So I just decided to purchase the Hyper Plus, which I must say is one of best investments I have made.

Yeah it would be great if you can post what your spec was.
Edited by Delicious - 3/11/13 at 6:08pm
post #19 of 19
The likelihood is the pump was plugged into a header that was throttling it... You have to disable PWM on that fan header and let it run full throttle... Fan speed should show 1450RPM

Comps
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