How it Works PowerNow! Are the two equal? As we should all know by now, lower clocked processors don’t always require that the same amount of voltage be supplied to them as those with higher operating frequencies. Sign up now Username Password Remember Me. Then, as the user begins to use the program, the CPU clock speed varies according to the needs of the application and the tasks that are running. The premise behind PowerNow! Log in Don’t have an account?

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This switching does not occur dynamically, as in, in the middle of programs, rather it happens based on the presence of an external power source. However, upon entering the application, the system has to wait for user input, meaning that there’s no reason for the CPU to sit there at full power waiting for the user to input commands.

Internet Application Performance with PowerNow!

Etchnology is the problem that PowerNow! For those of you that are in-touch with the mobile CPU industry, this may sound like a competing technology from Intel, known as Speedstep.

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PowerNow! – Wikipedia

How it Works PowerNow! Think about how much power your CPU must devote to running a word processing application, now think about how much power is required for a CPU to playback a DVD video stream. The whole idea behind PowerNow! While the two technologies have their similarities, keep in mind that Intel’s Speedstep basically allows you to switch between two clock speeds depending on whether you’re running off of your battery or your laptop is plugged into the wall.

The premise behind PowerNow! As we should all know by now, lower clocked processors don’t always require that the same amount of voltage be supplied to them as those with higher operating frequencies.

AMD’s K6-2+ in Notebooks – Evaluating Performance with PowerNow

For example, a Pentium III will run at MHz by default if plugged into the wall but if the notebook is running on battery power alone, in order to conserve power the CPU will drop down to a lower voltage and a MHz clock speed.

This is where PowerNow! Post Your Comment Please log in or sign up to comment.

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Then, as the user begins to use the program, powernnow CPU clock speed varies according to the needs of the application and the tasks that are running. Content Creation Performance with PowerNow!

Log in Don’t have an account? It would thus only make sense that as the clock frequency of the processor is varying that its core voltage should vary as well, which is exactly what PowerNow!

But if the two tasks don’t require equal amounts of CPU power, then why is it that we are treating both tasks as if they did?

Sign up now Username Password Remember Me. For example, launching an application requires immediate attention of the processor, meaning that the CPU would jump up to a fairly high frequency in order to make sure that the application loaded quickly.

Are the two equal?