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Thread: GA-EX58-UD5 - Set CPU Clock Drive = 900mv?




  1. #1
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    Question GA-EX58-UD5 - Set CPU Clock Drive = 900mv?

    Everything I can find regarding the GA-EX58-UD5 indicates that in “Advanced Clock Control” “CPU Clock Drive” should equal 800mv. My supplier is recommending that for a 3.8 or 4GHz OC it be set to 900mv. Has anyone ever used this value?<o:p></o:p>

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    Default Re: GA-EX58-UD5 - Set CPU Clock Drive = 900mv?

    Some have tweaked clock control values. This setting is also present on other boards such as my P45 based UD3. However it is IMO a bit presumptuous of your supplier to recommend increasing the value as all components vary. Your CPU could well be fine and stable at 800mV, and be unstable at 900mV. The opposite could also be true, as well as the possibility that the CPU will be stable regardless of this value.

    Clock drive settings would be one of the last settings CPU/MCH based that I would tweak on a P45 and I'd carry this philosopthy over to Core i7. Use whichever value is set when loading Optimized Defaults and carry out the recommended i7 OC tweaks first such as altering BCLK, QPI RAM multi etc and their various voltages. Clock drive is something I would change when all else fails, just before I attempted to try any Skew values.
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    Default Re: GA-EX58-UD5 - Set CPU Clock Drive = 900mv?

    800mv should be fine, I have seen much higher clocks ran at less than 800mv.

    As said above, stock values for these are fine and should only be changed as a last resort, and really would only be needed at 4.5-5Ghz+

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    Default Re: GA-EX58-UD5 - Set CPU Clock Drive = 900mv?

    Thanks for that.

    Looking at another PC from the same company I think they have their standard configuration for CPU Clock Drive and PCI Express Clock Drive reversed.

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    Default Re: GA-EX58-UD5 - Set CPU Clock Drive = 900mv?

    Well if it is from Gigabyte they should be at 800/900, but someone could have loaded fail safe settings instead of optimal and that will set them to 700/700

    Of course you mentioned another PC so you likely also meant another board manufacturer so that may not apply, just thought I would toss it out there for you.

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    Default Re: GA-EX58-UD5 - Set CPU Clock Drive = 900mv?

    Hi

    Both systems are GA-EX58-UD5 i7 920 based from a high profile OCing company.

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    Default Re: GA-EX58-UD5 - Set CPU Clock Drive = 900mv?

    Ahh, well maybe they are just tinkering around then.

    It is fine left at defaults of 800/900, I have ran that way for 239 Bclk and 5Ghz without issues see my clock here all using optimized defaults of 800/900 >>
    http://forums.tweaktown.com/f13/lsd-...ls-dice-33153/

    Forgot to add, if possible for you, you should build your own system. It is very simple and will save you 100's of $$
    Last edited by Lsdmeasap; 09-08-2009 at 02:31 PM.

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    Default Re: GA-EX58-UD5 - Set CPU Clock Drive = 900mv?

    INCREASING CPU CLOCK DRIVE MAY FRY YOUR PROCESSOR OVER TIME!

    I had tremendous success improving my OC by increasing CPU Clock Drive to 900mv on my i7 930.

    I was stuck at 3.5 ghz, and after increasing from 700mv to 900mv, i got to 4.1 GHZ Prime95 stable at 1.3 volts.

    Wanting to tend toward system stability, i reduced the clock to 3.6 Ghz, lowered memory speed to below specs (around 1200 on 1333 sticks), and pulled back on some voltages. The only CPU setting I kept high was CPU Clock Drive at 900MV. It was stable and cool.

    But now after about 1 year of use, i'm having big problems that are looking like they're related to the CPU. First, my system crashed, and then would not overclock at all, no matter the settings.

    I reset the system at stock speed and default settings. It seemed to work well. But now, after only a month, my OS Windows 7 Ultimate 64 bit was totally corrupt.

    Changed hard drive and did complete reinstall on new SSD. OS became corrupt after about three days of use at stock speeds.

    System Restore seemed to return stability.

    Checked memory: Memory checks out great.

    Lowered clock to 2.5 GHz, and it was stable for two more days, but now i'm getting indications or corruption again.

    This is either a Motherboard issue, or a CPU issue, it seems to me. But there's not really any indication of MB issues (Gigabyte X58A UD3R). I'm thinking there's something going on with the processor. Have run Prime95 for a couple hours without error, but I'm still wondering.

    Given that the chip will not overclock now, it seems that the chip's "sensitivity" has been degraded.

    It could also be that coincidently, the new SSD (Crucial 128 MB) is bad and causing corruption. It did show 66 bad sectors on chkdsk when installed, but now it shows clean. But it appears that up to 2% bad sectors is somewhat normal on these drives.

    I'm thinking of getting a new i7 920 and see what happens.

    Should I replace my SSD from Newegg first (before the 30 day period is up), to make sure its not a hard drive issue? Given that the old hard drive that was originally corrupted is relatively new and checks out great now, I doubt its the HD.

    Any thoughts?

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    Reinstalled Windows 7 Ultimate, 64 bit.

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    Default Re: GA-EX58-UD5 - Set CPU Clock Drive = 900mv?

    I just wanna add I've been running with 900mv cpu since launch 2 years ago,6 months at 3.8 and rest of the time at 4.2ghz without any issues what so ever,I would rma your ssd first while you have the chance,then test with replacement ssd,don't dive in and buy new cpu just yet,cpus are pretty tough
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    Default Re: GA-EX58-UD5 - Set CPU Clock Drive = 900mv?

    CPU's degrade naturally, but it doesn't sound like you've abused yours so I wouldn't expect that so soon, but it could happen.

    If it did happen, I also doubt it's the CPU clock voltages, I've ran 1000 at times under very high other voltages with heavy loads and no problems. And I have ran 900 as mentioned above, for a very long time.

    If you think the SSD is part of the issue, try a spinning hard drive for a week and see if it corrupts again or not.

    SSD is more sensitive to memory errors than normal drives and could be corrupted that way, so be sure to heavily test your memory (Memtest86+ for a long time, then 4-6 instances of HCI memtest with 600-800MB each up to 1000%)

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