[CLOSED] undervolt

[Peter Linu]

Hiyall,
I found this in the Software Manager.

Does this mean that the powers-that-be intend to add undervolt to the range of software? I hope so because I've had no luck in configuring it from the owners website!

[Moonstone Man]

Does this mean that the powers-that-be intend to add undervolt to the range of software?

Honestly, how on earth would anyone know what some unknown person or persons might or might not do with some unknown thing at some unknown point in the future?

[Peter Linu]

any chance to put the boot in, eh KM?

[Moonstone Man]

any chance to put the boot in, eh KM?

It is not a case of sticking the boot in, Peter. It is telling it like it is.

Nobody here who knows what they are doing will assist with undervolting. If you need to reduce the power consumption of the machine then you should consider learning about what all the options do in the machine's BIOS and use the machine's BIOS settings to reduce the CPUs performance. For example, turn off hyper-threading or disable CPU cores, or ramp up the fans, modify the CPU power curve and so on, but to do those things you need to read the machine's manual and figure out what options you have available to turn the CPU performance down.

You have been given the correct advice. What you do with it is up to you.

[Peter Linu]

I'd assume that the management occasionally looks at the forum if for no other reason than idle curiosity.
I've been down the BIOS path. Most manufacturers have disabled support for BIOS changes of this nature long ago because too many people were bricking their machines. That's the reason for the need of 'undervolt'.

[Moonstone Man]

Most manufacturers have disabled support for BIOS changes of this nature long ago because too many people were bricking their machines.

I don't buy that at all. Switching off HT and disabling CPU cores is essential under some circumstances. Even the manual for the machine in your signature makes it clear that some of the options I've mentioned are available to you right now.

https://download.lenovo.com/ibmdl/pub/p ... _ug_en.pdf

Specifically pages 114-116.

[Peter Linu]

pps114-116 is about the dock. p130 is about temperature but there are only 2 choices; flat out and balanced neither of which is suitable.
Any other ideas?

[Moonstone Man]

pps114-116 is about the dock. p130 is about temperature but there are only 2 choices; flat out and balanced neither of which is suitable.

I don't what you are looking at but I'm looking at the link I gave you above, and I'm referencing the printed page numbers at the bottom left of each page, not the page number that a PDF viewer provides; they are different.

[Peter Linu]

OK. We're on the same page. Please read my previous comments.

[Moonstone Man]

OK. We're on the same page. Please read my previous comments.

Please read my previous comments.

[Peter Linu]

KM,
I've bin there. It only affects frequency - not voltage.

[Moonstone Man]

... It only affects frequency - not voltage.

Absolutely wrong, on multiple levels.

V = P/I ie. Voltage = Watts / Amperes

Reduce the frequency and current demand reduces. Reduce the core count and current demand reduces. Reduce the current then voltage reduces. Reduce either current or voltage and power consumption and dissipation reduce, hence heat reduces. Put another way, CPU power consumption and heat dissipation, which reduce as the square of the frequency i.e. they are inversely proportional, is precisely why laptop battery life is extended by running the CPU at the lowest possible frequency to perform a task in a given amount of time, i.e Watts = Joules / time. Thus power in Watts is directly proportional to voltage times frequency. Increase the workload and power consumption and dissipation increase, which is why the temperature goes up when using, for example, a browser.

All of that is proven science, not mere opinion.

QED

[Peter Linu]

KM,
I have bin fiddling with electronics for 40 years so i don't need you to teach me to suck eggs. I too thought by doing as you suggested would work BUT IT DIDN'T. Computers and their masters seem to have a different agenda.

[Moonstone Man]

I have bin fiddling with electronics for 40 years ...

Then you don't ever need my advice again. I'll leave you to draw on your 40 years of fiddling.