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Thread: A little undervolting adventure

  1. #49
    Sprouts are not food Attila the Bun's Avatar
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    Re: A little undervolting adventure

    Quote Originally Posted by kalniel View Post
    CPUz

    http://www.cpuid.com/softwares/cpu-z.html

    Handles the vCore which is the main target. Stock voltage varies for each and every processor, so it'll just be the default before you change anything. You probably want to load up your computer with something like prime95 (http://www.mersenne.org/freesoft/) to get the 100% load voltage rather than idle.
    CPU-Z I have...and I was looking at prime95 last night but decided to ask first before downloading it.
    Of course I'm perfect you just need to lower your expectations.

  2. #50
    Not a good person scaryjim's Avatar
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    Re: A little undervolting adventure

    If you want a quick CPU load wprime's not a bad option either (it's what I tend to use), although for stability testing prime95 is probably a better option. But a 4 thread 32M wprime should give you about 20s* of full load on a 965BE, which is long enough to take some quick voltage and power-draw figures for future reference

    *disclaimer: I pulled this figure out of thin air: do not trust it

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  4. #51
    Sprouts are not food Attila the Bun's Avatar
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    Re: A little undervolting adventure

    Quote Originally Posted by scaryjim View Post
    If you want a quick CPU load wprime's not a bad option either (it's what I tend to use), although for stability testing prime95 is probably a better option. But a 4 thread 32M wprime should give you about 20s* of full load on a 965BE, which is long enough to take some quick voltage and power-draw figures for future reference

    *disclaimer: I pulled this figure out of thin air: do not trust it
    I shall check this at home later as work doesn't like your link...but then the work firewall doesn't like much these days, I'm surprised that hexus isn't blocked to be honest.
    Of course I'm perfect you just need to lower your expectations.

  5. #52
    Banhammer in peace PeterB kalniel's Avatar
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    Re: A little undervolting adventure

    Quote Originally Posted by Attila the Bun View Post
    I shall check this at home later as work doesn't like your link...but then the work firewall doesn't like much these days, I'm surprised that hexus isn't blocked to be honest.
    I bet the gaming section is

    http://gaming.hexus.net/

  6. #53
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    Re: A little undervolting adventure

    Quote Originally Posted by kalniel View Post
    I bet the gaming section is

    http://gaming.hexus.net/
    No problem there ... it's happy with me looking at gaming sites but it does block any and all flash content. To be honest though the internet link is so slow these days we may as well have dial up.
    Of course I'm perfect you just need to lower your expectations.

  7. #54
    Efficiency freak Queelis's Avatar
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    Re: A little undervolting adventure

    You can use StressCPU from folding@home site - has the same load as F@H, didn't find anything better yet.

    It's here:
    http://folding.stanford.edu/English/DownloadUtils#ntoc1

    As for temps and RPM - simple SpeedFan.
    Last edited by Queelis; 06-11-2010 at 09:53 AM.

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  9. #55
    Sprouts are not food Attila the Bun's Avatar
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    Re: A little undervolting adventure

    Well that's just fine and dandy isn't it...my lovely quiet Saturday morning is right out the window

    Oh well I'll download the software tonight and maybe get a chance on Sunday.
    Of course I'm perfect you just need to lower your expectations.

  10. #56
    Efficiency freak Queelis's Avatar
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    Re: A little undervolting adventure

    Quote Originally Posted by Attila the Bun View Post
    Well that's just fine and dandy isn't it...my lovely quiet Saturday morning is right out the window

    Oh well I'll download the software tonight and maybe get a chance on Sunday.
    Waiting anxiously for the results - seeing that my CPU is identical, we'll see who got a better sample

  11. #57
    Sprouts are not food Attila the Bun's Avatar
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    Re: A little undervolting adventure

    Quote Originally Posted by Queelis View Post
    Waiting anxiously for the results - seeing that my CPU is identical, we'll see who got a better sample
    Don't worry it will be you ...I'm even having problems downloading the software
    Of course I'm perfect you just need to lower your expectations.

  12. #58
    Efficiency freak Queelis's Avatar
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    Re: A little undervolting adventure

    Quote Originally Posted by Attila the Bun View Post
    Don't worry it will be you ...I'm even having problems downloading the software
    You just download the .tgz and extract it (if your PC doesn't know how to, get 7-Zip) to some folder and launch it from there - that's it

  13. #59
    Sprouts are not food Attila the Bun's Avatar
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    Re: A little undervolting adventure

    Now I'm a tad concerned. Under full load the CPU is running at 61° and the stock fan isn't speeding up to counteract the temperature increase.

    I wonder if there is a conflict between SpeedFan and ASUS's fan management program?
    Of course I'm perfect you just need to lower your expectations.

  14. #60
    Efficiency freak Queelis's Avatar
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    Re: A little undervolting adventure

    Quote Originally Posted by Attila the Bun View Post
    Now I'm a tad concerned. Under full load the CPU is running at 61° and the stock fan isn't speeding up to counteract the temperature increase.

    I wonder if there is a conflict between SpeedFan and ASUS's fan management program?
    Does the Asus' program have some cooling profiles? Maybe the temperature is set at 65, for example, only to spin up the fans then. Then you'd have to lower it (Phenoms don't tolerate heat very well).

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  16. #61
    Sprouts are not food Attila the Bun's Avatar
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    Re: A little undervolting adventure

    Quote Originally Posted by Queelis View Post
    Does the Asus' program have some cooling profiles? Maybe the temperature is set at 65, for example, only to spin up the fans then. Then you'd have to lower it (Phenoms don't tolerate heat very well).
    It does indeed have cooling profiles.
    It was set to standard with full revs only coming on at 70°.

    With the change of profile the temp is fairly stable at 53°
    CPU revs running at 3500
    Chassis fan at 1530.
    Core Voltage 1.356

    But I have 2 chassis fans why is only one registering?
    Of course I'm perfect you just need to lower your expectations.

  17. #62
    Efficiency freak Queelis's Avatar
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    Re: A little undervolting adventure

    Quote Originally Posted by Attila the Bun View Post
    With the change of profile the temp is fairly stable at 53°
    CPU revs running at 3500
    Chassis fan at 1530.
    Core Voltage 1.356

    But I have 2 chassis fans why is only one registering?
    Maybe the other one is connected directly to the CPU? Or the fan/fan header don't have the RPM reporting function?

    Have you tried lowering the Vcore a bit? You could shave off several degrees, I'm sure

  18. #63
    Sprouts are not food Attila the Bun's Avatar
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    Re: A little undervolting adventure

    Quote Originally Posted by Queelis View Post
    Maybe the other one is connected directly to the CPU? Or the fan/fan header don't have the RPM reporting function?
    Actually...I've just remembered I have one fan that is directly attached to the psu as I didn't have a cable extension long enough to reach the motherboard connector.

    Quote Originally Posted by Queelis View Post
    Have you tried lowering the Vcore a bit? You could shave off several degrees, I'm sure
    I did try a small reduction in the Vcore using an ASUS utility (which seems to be "pimped" version of SpeedFan) and yes I did get a reduction in temperature of about 2°. However, as I have been getting some stability issues since I changed my RAM settings from 9-9-9-24 to 8-8-8-24 I've decided to sort that little problem out first before seriously testing undervolting.

    I'm surprised about the RAM instability though. The mobo is rated up to 2000oc (mine is 1600) and the RAM itself was designated 8-8-8-24. There is obviously something I'm not doing so I shall be hunting the net tonight on how to do this properly.
    Of course I'm perfect you just need to lower your expectations.

  19. #64
    Efficiency freak Queelis's Avatar
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    Re: A little undervolting adventure

    Quote Originally Posted by Attila the Bun View Post
    Actually...I've just remembered I have one fan that is directly attached to the psu as I didn't have a cable extension long enough to reach the motherboard connector.
    You can buy extension cables, I'm sure. If your motherboard regulates the speed of 3 pin fans, then you'll be able to cut down on the noise a bit (you can buy a resistor to drop the voltage from 12V to 7V, for example)

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