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AMD Phenom II X4 965 BE Determining Stock/Default Voltage

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April 8, 2013 11:37:55 AM

Hey there,

I'm wondering if each one of these processors has an identical predetermined voltage from the factory or if the default voltage will vary from chip to chip, motherboard to motherboard. If the default voltage is uniform for every chip, what is it?

-Thank You
April 8, 2013 3:42:45 PM

ish416 said:
Here is your answer directly from AMD ... http://products.amd.com/en-US/DesktopCPUDetail.aspx?det...

Voltages 0.850-1.425V


Are these the same voltages for 125 W version of this chip? I have the 125 W version. Is there a specific voltage in that range that is the actual factory voltage? Or is that just the range they normally run in? I've heard that the maximum voltage for this chip is 1.55, is that correct?
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April 8, 2013 3:43:35 PM

It will vary from chip to chip. One 965 may be able to run it stock clocks @1.0V another may take 1.25v and another may take 1.3v. Not every chip runs at the exact same voltage.
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April 8, 2013 3:55:28 PM

ish416 said:
Here is your answer directly from AMD ... http://products.amd.com/en-US/DesktopCPUDetail.aspx?det...

Voltages 0.850-1.425V


cmi86 said:
It will vary from chip to chip. One 965 may be able to run it stock clocks @1.0V another may take 1.25v and another may take 1.3v. Not every chip runs at the exact same voltage.


Thanks for clearing that up. On AMD's site it looks like the voltages for the 125 W are between .825 - 1.40 V. So if I set my CPU voltage to auto in the BIOS it should set it to something in this range? I'm curious because my CPU VID is currently at 1.475 V and I don't recall changing this. It must be able to run at a lower voltage at stock (3.4 GHZ) clocks right?
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April 10, 2013 1:00:24 AM

Yes your cpu most likely can run at a much lower setting than 1.474V I would think that 1.3V would work for 99% of the 965BE's out there at stock settings... You might even be able to go lower but you would need to do stress testing to make sure with a program like LinX or Prime95 or OCCT.... You just gotta go into the BIOS and Manual set the voltage to a reasonable level. Heck even 1.4V is going to be a lot cooler than what you have currently as long as what you are seeing as the voltage is correct and not a bios or software bug.
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April 10, 2013 2:16:10 AM

I am able to run my 965 BE at 3.8Ghz OC'd at 1.375v.

So for stock clock you should be able to lower that, maybe 1.35?
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April 10, 2013 9:43:13 AM

BuddiLuva said:
I am able to run my 965 BE at 3.8Ghz OC'd at 1.375v.

So for stock clock you should be able to lower that, maybe 1.35?


It is highly likely that at stock clocks you could run at even less than 1.35V but till you try it and do stability testing I cannot know 100% if it will work.

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April 10, 2013 12:56:10 PM

utroz said:
BuddiLuva said:
I am able to run my 965 BE at 3.8Ghz OC'd at 1.375v.

So for stock clock you should be able to lower that, maybe 1.35?


It is highly likely that at stock clocks you could run at even less than 1.35V but till you try it and do stability testing I cannot know 100% if it will work.



I set the voltage to 1.35 V and ran prime95 for 3.5 hours with no warnings or errors. Is that a safe amount of time to ensure it's stable? During the test, max temp was 44.6 C and average was 41.5 C. I definitely noticed that it's running at cooler temps during the stress test than when it was at 1.475 V.
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April 10, 2013 6:22:49 PM

3.5 hours of prime95 means your cpu is roughly at least 99.995% stable. Some people swear by 24 hours of prime95 for full 100% stability but unless you will have your cpu pegged out at 100% usage for days at end you are in the clear. Yes lower voltages will lower the temp by a large amount. At the 1.45V setting you should have been able to get close to 4.0Ghz with your cpu so if you ever need more performance and cannot afford to upgrade just try upping the voltage and multiplier.
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April 11, 2013 1:01:00 AM

utroz said:
3.5 hours of prime95 means your cpu is roughly at least 99.995% stable. Some people swear by 24 hours of prime95 for full 100% stability but unless you will have your cpu pegged out at 100% usage for days at end you are in the clear. Yes lower voltages will lower the temp by a large amount. At the 1.45V setting you should have been able to get close to 4.0Ghz with your cpu so if you ever need more performance and cannot afford to upgrade just try upping the voltage and multiplier.


+1

I would try to lower it even more!
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