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Phenom II 955BE Overclocking frustrations.

post #1 of 48
Thread Starter 
I'm irked at this processor and it's overclocking, so I finally decided to try and make a post.
Me and Gabead have been working on my overclock, and I discovered that at <1.5V I cannot achieve 4.0MHz or better. Going any higher would make more heat and my stock cooler sounded like a really big model air plane flying around the room. So I got a H50 and put in some better case fans.

Last night I started at 4.1 and 1.7V, running Prime until the self test passed and then dropping the voltage. I got to 1.575v I believe before it BSOD'd and I bumped it up two to 1.6V and left it to run overnight. Prime95 crashed two hours in, with a max temp of 49C. Frustration.

I bump the voltage up one more time to 1.625 and leave it to run Prime95 while I go to work, come home to a BSOD. Extreme frustration.

The former seems stable enough that it just causes a problem with Prime95, the latter causes an entire system BSOD. What am I doing wrong here? I have not done anything with the NB, and have set the HT to 2.0MHz, and set my memory timings to manual but made no changes since they were already set to the 9-9-9-9-24. Other than that I've changed nothing, so is there something I've missed that will stabilize the 4.1 clock, or do I just need to accept that the 4.X range is out of reach?
post #2 of 48
WOAHWOAHWOAH, 1.7V on a Phenom II on a H50???? Max voltage is usually around 1.55V, and only people on custom watercooling loops usually try getting close to that.

Also, I'm going to assume you mean 4GHz when you say
Quote:
Originally Posted by Death Jester View Post

I cannot achieve 4.0MHz or better.


Perhaps you need to loosen your timings, since your memory might be running at higher speeds now that you've overclocked. Is it still at 1600MHz, or is it higher?

And your chip might just be unlucky. Is it a C2 or a C3?
Edited by GuardianDuo - 11/19/11 at 8:27pm
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post #3 of 48
Thread Starter 
Yep, 1.7V, why?

and yes, sorry, 4.0GHz
post #4 of 48
your really pushing too hard ...even with better cooling( full blown water) anything over 1.6 is too much....your going to seriously reduce the lifespan. Your sure you maxed out at 49c? You would do better to back it down to whatever you can reach at 1.5v and tweak everything else for max performance....your cpu/nb and ram and so forth...
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post #5 of 48
Quote:
Originally Posted by Death Jester View Post

Yep, 1.7V, why?
and yes, sorry, 4.0GHz

Your going to destroy that chip at that voltage. 1.55v MAX, and thats extreeme for 24/7 usage. 1.50 is as high as I will go for safe 24/7 usage.
Phenom II's on the deneb CPU's have a common limit at 4.0GHz. The thuban chips can get a better overclock on avrage. but yea...that chip is probably toast by now at those voltage's.
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post #6 of 48
Thread Starter 
Well, on 100% load it never went over 60C at 1.7V and seems to hang around the 55C range.. well short of the 89C max and the 62C soft limit.

it's a C3, and the memory is set to 1333 since everything I have seen shows the Phenoms seems to like that more than 1666+, sorry, I forgot that I did change that. My apologies.

*edit* I promise you, I've kept a very close eye on temps, and unless it BSOD'd I noted down the max temp and what it seems to hang around. I have yet to see 61C.
Edited by Death Jester - 11/19/11 at 8:34pm
post #7 of 48
Thread Starter 
So I'm sensing some discomfort at the fact I ran it at 1.7V, but I can't figure out why. What damages chips is heat, correct? That's the only force that exerts itself on a chip that I know of since there are no moving parts for erosion of material. If I never went over 60 degrees Celsius, why would my chip be toast?
post #8 of 48
run your fsb up to 250 or more.....set your cpu/nb up to around 3000 you can go to about 1.5v on that also but can probably get by closer to 1.3 or so and maybe play with ram timings abit, your right those chips like slightly slower tighter timings than faster looser. Set your cpu to the best it will run while in the 1.5v range and call it a day....it'll last longer and perform better for the long haul wink.gif
Edit: the extra voltage will damage it even with temps in check, it is simply more than the circuits can handle
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post #9 of 48
Quote:
Originally Posted by Death Jester View Post

Well, on 100% load it never went over 60C at 1.7V and seems to hang around the 55C range.. well short of the 89C max and the 62C soft limit.
it's a C3, and the memory is set to 1333 since everything I have seen shows the Phenoms seems to like that more than 1666+, sorry, I forgot that I did change that. My apologies.
*edit* I promise you, I've kept a very close eye on temps, and unless it BSOD'd I noted down the max temp and what it seems to hang around. I have yet to see 61C.

As the others have said 1.7v is definitely WAY TOO MUCH voltage.And I'm not sure where you're getting 89C from, but max IS 62C and the more voltage you apply and the higher the frequency, the cooler it needs to be. So if at 1.30/stock speed max is 62C; 1.7 @ 4.1max will be ? (A whole helluva lot less).

Personally, I don't like to go over 1.45v on a Phenom II for 24/7 usage.
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post #10 of 48
Thread Starter 
Quote:
Originally Posted by mrinnocent View Post

run your fsb up to 250 or more.....set your cpu/nb up to around 3000 you can go to about 1.5v on that also but can probably get by closer to 1.3 or so and maybe play with ram timings abit, your right those chips like slightly slower tighter timings than faster looser. Set your cpu to the best it will run while in the 1.5v range and call it a day....it'll last longer and perform better for the long haul wink.gif
Edit: the extra voltage will damage it even with temps in check, it is simply more than the circuits can handle

I'm still not understanding memory timings, the reading I've done on it hasn't really cleared up the subject at all. I'm assuming that a lower timing will require more voltage, but like with the CPU there is a limit on how far you can push it?
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