how to lower the cpu voltage?


today i realized that one of my CPUs (AMD Athlon 64 3000+, Venice) is running at 1.46V while the other (AMD Athlon 64 3000+, Venice) is operating at 1.40V. Please tell me how to lower the voltage, any avantages/disadvantages of it. Both are running at stock speeds. 3000+ is on A8N sli premium while 4400+ is on a8n32 sli deluxe.
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  1. Well, I've had the same problem on my A8V-MX. While the safety zone for a 90 nm K8 extends up to 1.55V, the lower the voltage, the cooler and healthier the CPU.
    For lowering the Vcore, you can go in the bios and drop the reference voltage there if the bios allows this. If it does not, you can do as I have done; Install RMClock (download from and you can set different voltages for every power state of the CPU.
    My board, supplied the 3000+ with about 1.50V but with RMClock, I set it to run with just 1.25 on load (Venice cores undervolt pretty well) and load temps dropped by 8-12°C. The same way I undervolted the X2 4200+ from 1.40 to 1.35; temps. went 5°C down.
  2. thanks but i cant figure how to use this thing. could you please tell me what exactly i need to do to bring down the voltage? i have set the voltage to 1.4 just about everywhere but my cpu still is at 1.46
  3. You need to do such in the BIOS. There should be an option called VCore in the advance CMOS section (name varies from motherboard to motherboard) which will allow you to lower the voltage too the A64's core.
  4. if the temps are the same at 1.4 or 1.46 then its fine. it may be different then what it says usually mobos read high
  5. IN RMClock, and in your case, you have to set the VID to something lower than what you want, say 1.30 to get 1.40V or as in my case, I set the VID 1.30 and CPUZ (and other monitoring software) show the correct 1.35V.
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