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Phenom II 965 undervolting?

post #1 of 9
Thread Starter 
http://www.anandtech.com/show/2821

The 140W version reportedly works at 1.24v. How low can the 125W version on stock?

http://forums.anandtech.com/showthread.php?t=2057630

these guys say 1.2v

I don't have the time to bench hours for each step down.

Edit: Actually that guy was using an underclocked unlocked 550 at 1.2v.
Edited by Popple - 7/28/11 at 10:38am
post #2 of 9
It's up to you to find out I guess! Every chip overclocks or undervolts differently. Be sure to run the proper stability tests.
post #3 of 9
Thread Starter 
How much does stress testing shorten the lifespan of a processor?
post #4 of 9
Quote:
Originally Posted by Popple View Post
How much does stress testing shorten the lifespan of a processor?
Stress testing won't shorten the lifespan of your CPU. Just make sure to keep the temperatures withing the "safe" ranges and you'll be OK; but since you're undervolting rather than overvolting; temperatures shouldn't even be an issue for you. Either way; provided you don't kill the CPU by doing something weird; it should last you for a long time. I have a P4 that I bought about 7 years ago and it still runs, even after some very "stressful" sessions with it.
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post #5 of 9
What is the point of undervolt?

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George
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post #6 of 9
Quote:
Originally Posted by gchou View Post
What is the point of undervolt?

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Some people don't really need to overclock their CPUs and these chips will run at stock speeds with less volts than what the stock settings call for. Look at it this way... Less volts = less heat and less heat = longer life span
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post #7 of 9
Pretty much. In many cases stock voltage is massively excessive. For example, mine runs at 1.275v for 2800mhz. I can run 3445mhz at 1.2v.
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post #8 of 9
The life span idea is pretty well irrelevant. I've only ever had one chip degrade at all ever, and it's this 965. From my 1st cpu (Intel 8088) until now, & that is a pretty good track record.

But put into context, this particular 965 has been run under LN2, DICE, Phase change, and water for the first year of it's life by it's previous owner. Since then, I have run it hard under air, and water personally. And even with all that abuse, it's just lost 200 Mhz off it's top oc.

I have several cpu's that were overclocked. 5-6 years old, and totally useless due to age of architecture, not degrading. Any other cpu should last nearly the same if not more. If you're trying to save energy. Ok. But stock voltages will not equal a lesser lifespan for your cpu.

If you're undervolting, there is no need in that VenX. You may as well get your money back out of it, and put the factory HSF back on it as it's more than capable of doing the job. Anyway, good luck with your project.
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Yate Loon D12SH-12 Silverstone SST-AP181 Koolance DDC pump housing/heasink Sunon 60 mm cooling fan for pump housing 
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Bitspower 7/16" Black Sparkle compression fitt... Bitspower Black Sparkle 90 degree double rotary... Bitspower 45 degree rotary fittings Primochill LRT UV blue tubing 
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XSPC Rasa cpu block XSPC RX-240 radiator XSPC DDC res. top Laing DDC-1  
OSMonitorKeyboardPower
7 Professional Samsung EX-2220 Das Professional Seasonic's dead :( 
CaseMouseMouse PadAudio
Lian Li T60-B PureTrak Valor Ratpadz GS Auzentech X-plosion 7.1 
AudioAudioAudioOther
AKG K701's Lil Dot MK.III hp amp Burr-Brown OPA627SM opamp upgrade Custom built MTM style transmission line 
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post #9 of 9
Cool'n'quiet will maintain processor longetivity in the same way as undervolting, but you will get better performance when you do need it.
Undervolting is great for reducing heat & power usage, especially useful on laptops.
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