How do you change CPU voltage?

I'm using a phenom II X4 and its voltage is 1.4 right now... but it has been running hot and so i want to lower it to 1.35.

In the BIOS the options i see are CPU voltage, cpu/nb voltage, and cpu vdda voltage. Should I change all of these to 1.35 or what? Thanks.
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  1. No do not change all of them.

    First what temps. is the CPU running at under full load? There may not be any need to change voltages unless you are OC'ing.
  2. beenthere said:
    No do not change all of them.

    First what temps. is the CPU running at under full load? There may not be any need to change voltages unless you are OC'ing.


    http://www.tomshardware.com/forum/313035-28-running-phenom

    I wrote all the temp info in there.

    Since that post, I've reapplied thermal paste, but my cpu is still running hot it seems... the poster in that thread suggested I lower the voltage from 1.4 to 1.35... I'm running the CPU using a stock fan and I'm not overclocking it.


    Right now my temps are according to HWmonitor:

    TMPIN0: 52c
    TMPIN1: 34c
    CORE: 53c


    Part of this I think has to do with my room being hot a lot of the time...
  3. There is no way your AMD CPU would run @ 78C let alone 85C without major system problems. Try using "Core Temp" to check the temps under load. 55C is a useful limit under Prime 95, OCCT and Linpack but some AMD CPUs work fine up to 60C. The OE heatsink and fan is plenty sufficient for CPUs that aren't OC'd.
  4. beenthere said:
    There is no way your AMD CPU would run @ 78C let alone 85C without major system problems. Try using "Core Temp" to check the temps under load. 55C is a useful limit under Prime 95, OCCT and Linpack but some AMD CPUs work fine up to 60C. The OE heatsink and fan is plenty sufficient for CPUs that aren't OC'd.


    http://imageshack.us/f/825/unledzsy.png/
  5. what is exact brand motherboard and Phenom X4 ... ? just from Bios can do it
    Bios : sellect Voltage CPU sellect + smallest like ...+ 0.05v, 0.10v ..
  6. henydiah said:
    what is exact brand motherboard and Phenom X4 ... ? just from Bios can do it
    Bios : sellect Voltage CPU sellect + smallest like ...+ 0.05v, 0.10v ..


    I see cpu voltage in the BIOS, and I can change it, but is there anything else I need to change?

    There's CPU voltage, CPU/NB voltage, and CPU VDDA voltage. Do I just change CPU voltage and that's that?
  7. yep find voltage configuration [manual], disabled Cool n Quite, CPU voltage set smalest [many option] just it .. don't change other , CPU NB let Auto , CPU VDDA let Auto
  8. henydiah said:
    yep find voltage configuration [manual], disabled Cool n Quite, CPU voltage set smalest [many option] just it .. don't change other , CPU NB let Auto , CPU VDDA let Auto


    Thanks.
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