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Phenom II X4: some advice with stabilizing needed.

post #1 of 18
Thread Starter 
Hello,

I finally got to work on my stability issues with my Phenom 2 X4 965 BE and did some testing: I can go vom stock all the way to 3,9 Ghz just by multiplier. At 4,0 things start to get tricky and thats what I needed advice on:

at 4 Ghz OCCT still runs stable with small data sets (tested for about 1 hour and 20 min), but fails with an "error on core #X"-message after around 5 minutes of medium data set testing and 1 or 2 minutes of large data set.

For me, this is quite interesting, because my first reaction on this until now was to simply raise Vcore a few notches, but it seems that CPU voltage still has reserves and this does not improve stability on my rig.

CPU temperature is not an issue, at 4 Ghz small data set, it levels out at around 45°C.

So, whats the voltage or setting I should take care of now? RAM, Chipset or VDDNB?
Edited by SoulFlight - 3/21/14 at 6:21pm
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post #2 of 18
3.8 is considered the sweet spot for a lot of Phenom II quads (stability-wise). Here's mine stable for something to compare to if this helps. Note that not every chip will perform/overclock the same but this gives you an idea of what your looking at.


 
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post #3 of 18
Thread Starter 
Alright, here is mine, thats the technically stable 3,9 Ghz config, which survives all OCCT tests for at least one hour.




going to 4,0 seems to require some more tuning, thats what this thread is about. wink.gif
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post #4 of 18
I had to increase the voltage a bit more than I wanted (can't remember how much, been a while) to get even somewhat stable in gaming with 4Ghz overclock. This of course also increased temps by as much as ~8 or 9 degrees. It just wasn't worth it in the end for me.

EDIT: Here's a good thread on overclocking our CPUs.

http://www.overclock.net/t/777378/official-gappos-little-deneb-thuban-overclocking-guide-with-too-many-smileys
Edited by mrawesome421 - 3/21/14 at 7:08pm
 
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post #5 of 18
Quote:
Originally Posted by SoulFlight View Post

Alright, here is mine, thats the technically stable 3,9 Ghz config, which survives all OCCT tests for at least one hour.




going to 4,0 seems to require some more tuning, thats what this thread is about. wink.gif

I really wouldn't trust OCCT for stability testing. Can you use something like Prime95 or Intel Burn Test AVX? I use IBT and 10 runs of maximum. if it can do that im sold on its stability.
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post #6 of 18
Your motherboard also plays a bit of a role in how stable and how high your overclocking will go. Micro ATX boards tend to be less able to handle huge OC's and torcher tests ect.
 
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post #7 of 18
Thread Starter 
Quote:
Originally Posted by Deadboy90 View Post

I really wouldn't trust OCCT for stability testing. Can you use something like Prime95 or Intel Burn Test AVX? I use IBT and 10 runs of maximum. if it can do that im sold on its stability.

Well, of course I can, I have prime installed as well. But it seems to me that this issue is a matter of religion. wink.gif In fact, someone in this forum suggested me to use OCCT instead of Prime95 some time ago....
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post #8 of 18
Quote:
Originally Posted by SoulFlight View Post

Well, of course I can, I have prime installed as well. But it seems to me that this issue is a matter of religion. wink.gif In fact, someone in this forum suggested me to use OCCT instead of Prime95 some time ago....

Well how about Intel Burn Test? I used OCCT for a while and I found it quite inconsistent. Intel burn test can be found HERE.

Do 10+ runs of that on Maximum and i would call that stable.
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post #9 of 18
Stable is a subjective matter.

Most people on here will tell you that Prime for 12-24+ hours, IBT with 20-50 passes on maximum, OCCT for the 12-24+ hours is more stable.


At 1.39vcore, you are running out of head room there. What cooling do you have for your CPU ? What cooling for your VRM's ? You could be experiencing VRM throttling / protection etc

THIS will just add to your learning. Very trusting info.
post #10 of 18
Thread Starter 
I am sorry to tell and grateful for the info, but thats not really what I wanted to know.

My Problem is that I had a 4,0 Ghz config before, but this was unstable in certain conditions. For example, in Far Cry 3, there was a high probability the game would crash somewhere after 30 till 60 minutes of playing. (it still passes all of the tests, and trust me, I had run prime95 small fft for at least 12 hours then) After that, everything else crashes as well, which means I cannot even open a browser window after restart.

The Settings were as followed:

x20 = 4000 Mhz

CPU Voltage = 1,425v

VDDNB = 1,15v

Memory Voltage = 1,86v

Chipset = 1,145v

for some reason, this config was not really stable. I blame it on something overheating on my MoBo due to Voltage. I have to improvise with VRM cooling, as seen in this image:



The minisinks on ther VRM combined with a 120mm fan blowing directly at them is what I need to prevent the well known throttling. (Visible in CoreTemp if it occurs). My CPU cooling is a custom attached Zalman Reserator refitted with an active cooling fan on top of the radiator. Its very effective and like I said, the 3,9 Ghz config runs pretty steady at 45 °C max CPU in normal ambient temp.

Since it is pretty unlikely then that my CPU is overheating, I suspect something at my MoBo is overheating due to the increased Voltages I applied in my previous config. Therefore I decided to find new settings from scratch. Of course I do not run a 24 Hour test after each single option I changed, doing so would take me weeks to find a conclusion. My goal is to find out which voltage obviously was too high.


So what is going on, of you can run the small data pack tests in prime95 (just did this) or OCCT for virtually forever at 4,0 Ghz but the test fails on the medium or large data sets? That is what I wanted to know. What voltage setting is going to need juice then? VDDNB (Northbridge) or Chipset? Is there any need for Chipset Over Voltage when overclicking CPU only?

I think there is no use in debating about which program to use for testing, its more interesting which test to use in programs like prime, where you have three options. Its clear that the small FFT test is for maximum heat generation. But what about medium FFTs and blend? Which one of them is used to sufficently tell if your machine runs pretty stable or not?
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The Black Bloc
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