Asus p5kpl-cm voltage question.

Hello,

I was hoping someone could help me out with my voltage on my p5kpl-cm board.


I have a q9450 quad core and am tyring to OC it to 3.2ghz but by simply increasing the FSB to 400
prime95 has errors in one of the cores so I assume I need more voltage.

In my bios the voltage settings are as follows:
1.8 Dual Over Voltage - Auto, 1.80V, 2.00V, 2.25V
VTT_CPU Over Voltage - Auto, 1.2V, 1.3V
1.25 Over Voltage - Auto, 1.25V, 1.4V
1.5 Over Voltage - Auto, 1.5V, 1.6V

"VTT_CPU Over Voltage" I'm pretty sure that's the vcore voltage.
No matter what setting I put it to, Auto, 1.2 or 1.3 the voltage stays the same in CPU-Z and I continue
to get errors in prime95 in one of the cores.

Does my board just suck so badly that I am only able to OC to about 3ghz?
I'd like to get to 3.2 to get a 1 to 1 ratio.

Any help would be greatly appreciated!
5 answers Last reply
More about asus p5kpl voltage question
  1. VTT_CPU is not the cpu voltage. It has something to do with the CPU however and can increase stability a lot.
    The CPU voltage is usually the one with the smallest increments available.

    BTW: are those the only voltage settings available like 'auto, 1.2, 1.3'?
  2. Nils said:
    VTT_CPU is not the cpu voltage. It has something to do with the CPU however and can increase stability a lot.
    The CPU voltage is usually the one with the smallest increments available.

    BTW: are those the only voltage settings available like 'auto, 1.2, 1.3'?


    Hi Nils, thanks for the reply!

    Those voltage settings are the only options I have sadly.
    Should I try to increase the "1.25 Over Voltage" setting?
    Maybe leave the rest to auto and see what happens.
  3. Find the hardware monitor in the bios. It should monitor the cpu voltage. Then increase some voltage and see whether the cpu voltage goes up.
  4. Nils said:
    Find the hardware monitor in the bios. It should monitor the cpu voltage. Then increase some voltage and see whether the cpu voltage goes up.


    Well I tried every possible combination on all 4 voltage settings with no change in my VCore voltage :(

    I found a description of the voltage settings btw.

    "1.8v Dual Over Voltage" is "Manual Set Memory Voltage"
    "VTT_CPU Over Voltage" is "Manual Set FSB Termination Voltage"
    "1.25v Over Voltage" is "Manual Set MCH Chipset Voltage"
    "1.5v Over Voltage" is "Maunual Set ICH Chipset Voltage"

    I cant find any other voltage settings in my bios so perhaps Im just out of luck with this motherboard.

    Anytime i go past 3ghz I end up getting errors in 1 core on prime95.
  5. That's the name I was looking for: FSB Termination Voltage.
    I guess you're indeed out of luck with this motherboard. Maybe a newer bios version adds that setting but I doubt it. Anyway it's very strange to see such an important voltage setting is missing.
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