How to run the CPU at something like 75%?

Question

My notebook is too old for me to invest into a new fan (it will simply be replaced by a new one when the final heat death occurs), but when it runs on full speed I feel like sitting in front of a vacuum cleaner with integrated cooking... I'm currently using NHC, the Max Battery mode of which let's the CPU run at 50% (~800 MHz). That's fine for most applications, and both temperature and noise remain low. However, on some occasions I need a bit more speed, more around 75% maybe.

Can I set the power saving settings somehow so that the CPU won't surpass 75% of it's capability so that an acceptable compromise between power and noise is achieved? I can't set the CPU frequency in the BIOS and since on rare occasions I'd like to be able to switch to 100% without much hassling, hardware solutions like setting jumpers are no option.

This answer to a similar (linux!) question mentions NHC should be able to offer these options, but for me they are all greyed out:

The notebook is an Asus Z9200K, I guess NHC doesn't support its chipset enough for these advanced options.

Answer 1

I use RealTemp to modulate the clock to reduce processor loads and temps. Not sure if this will work with your processor or not.

Open RealTemp and click the settings button

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Then tick Clock Modulation and set the % of modulation you want, this is not % of processor power necissarily, so you may need a lower setting than you think, you may have to experiment some, I use 37.5% when encoding movies to reduce temps on a first gen core i5 processor in my Notebook.

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Answer 2

If you want to take the risk you could open your laptop and clean out all the dust. It can make a big difference.