CPU Voltage For Overclocking

By Ritwik7 ยท 7 replies
Sep 3, 2009
  1. Hello everyone.

    I recently overclocked my Phenom II X3 720 to 3.5GHz from the stock 2.8GHz using the AMD Overdrive Utility. Then I had increased my CPU VID to 1.4875V from 1.325V. I ran the stability test for an hour and all seemed stable enough.

    However, I can't seem to be getting stable at 3.6GHz unless I increase the CPU VID to 1.525V. Is this voltage level too high / dangerous. Could there be any ill-effects?

    Also, I read that I could keep the CPU VID to 1.325V and just increase the CPU Extra Over Voltage to a value of 0.2V to get a total of 1.525V. As soon as I did this and set my multiplier to 18X (3.6GHz) I got a BSOD without any delay. Did I understand or do something wrong?

    I would also like to know if a 1 hour AMD Overdrive Stability Test is enough to test the stability of the OC.

    Note : I had once managed to have my system stable at 3.6GHZ / 1.5V after many attempts. But that doesn't seem to happen any more.

    Sorry for the long post. Would be grateful for any help and suggestions. I'm attaching a screenshot of the AMD Overdrive Utility.

    Thank you.

    Attached Files:

  2. Jawshh

    Jawshh TS Enthusiast Posts: 392

    For maximum(3.7Ghz) bump the Vcore to 1.536 and set multiplier to 18.5
  3. LinkedKube

    LinkedKube TechSpot Project Baby Posts: 3,482   +44

    All cpus arent equal. 1.53volts in quite a bit unless you have a really good cooling unit. I hope you're not trying to do this on a stock cooler.
  4. raybay

    raybay TS Evangelist Posts: 7,241   +10

    We agree with Supersmashbrada...
    When you boost the voltages and all related, you must have the very best cooling... extra case fans, as well as a superior CPU cooler. Or your goose will be cooked way too soon. I would re-think the power supply as well... you want no weak links.
  5. Jawshh

    Jawshh TS Enthusiast Posts: 392

  6. Ritwik7

    Ritwik7 TechSpot Chancellor Topic Starter Posts: 1,672   +9

    Hi guys. I have an OCZ Vendetta II in a CoolerMaster CM690 case. The max temps on load are 38-40C. :)

    BTW, I have a Cooler Master Extreme Power Duo 600W PSU.

    I just wanted know whether the voltages will be a problem, as the temps seem fine.
  7. raybay

    raybay TS Evangelist Posts: 7,241   +10

    Great temps. If those continue, and your sensors are ok, you have nothing to worry about... but if you are a gamer, check them a few times during play.
  8. Ritwik7

    Ritwik7 TechSpot Chancellor Topic Starter Posts: 1,672   +9

    I'm guessing my sensors are OK. So you say that 1.525V is good to go? Also, any tweaking necessary with RAM speeds? I have a 2 GB stick of DDR3 1333. My FSB : DRAM shows up as 3 : 10.

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