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How to verify CPU Freq/Force Max Performance

post #1 of 4
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I have a Dell Precision M4700 with a i7 3920XM and would like to know what I can do to verify CPU Frequency and possibly force maximum performance all the time.

In my BIOS I have disabled SpeedStep and I am on the "Highest Power Setting"... Also, I am always plugged into power.

My Task Manager and CPU-Z show 2 different CPU Frequencies...

Any help? Thanks for the assistance.
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post #2 of 4
Use something like Prime95 to load all the cores and if doesn't throttle you should be able to see the max cpu frequency that your CPU is running. If BIOS allows it, you may be able to turn off both speedstep and C1E to allow it to run at that max speed.
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post #3 of 4
The Windows 8 Task Manager has the least accurate calculation of MHz so I would ignore anything it has to say about the speed of your CPU.

If your bios lets you, disable all of the low power C States like C1E, C3 and C6. I would recommend leaving EIST enabled. There is no need to disable it if everything else is set up correctly. Just make sure your Minimum and Maximum processor states are set to 100% in the Control Panel - Power Options.

RealTemp will tell you exactly what your CPU is doing including what C States are being used. If it shows your multiplier and MHz wandering all over the place when lightly loaded then it really is doing this. It follows the Intel recommended monitoring method so you can trust what it is telling you.

RealTemp T|I Edition
http://www.overclock.net/t/1330144/realtemp-t-i-edition
post #4 of 4
Why have you disabled speed step? Speed step just reduces power consumption at idle, which is really useful for a laptop.
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