Undervolting core -.100, a magic solution for every 1070 laptops?

On another website I had a discussion with another user who claimed to have solved his ROG 502VS temperature issues by undervolting the core by -.100 in some intel utility.

He claimed it didn't affect performance one bit because the 1070 was is receiving way more juice than it needs and can work at full capacity with only 85% voltage.

Is it true?

Now I won't pretend I know much about laptops but if this is true then this is basically a magic solution to any throttling issues and temps for notoriously hot laptops like the P35X. Why is no one talking about it?

 

If he's using Intel's Extreme Tuning utility then he's undervolting his CPU, not his GPU.

Yes, if you undervolt by enough you will cut down on the temperatures your CPU produces on load. On the flip side, there's the increased chance of instability (in the form of BSODs and other errors) as a result of over-aggressive undervolting, which is why guides to undervolting suggest incremental changes with stress testing for each change to make sure your system is still stable.

It's not a magic solution; the CPUs (for example the i7 6700HQ) used in current gen laptops are supposedly over-volted by the laptop manufacturers to avoid any quality-based issues. Users, when done correctly, can safely undervolt to remove this compensation. How far you can undervolt a chip is part of the silicone lottery when it comes to buying a CPU / soldered CPU+mobo. Some people's laptops crash at -40mV, some can undervolt upwards of -200mV without any issues on prolonged stress tests.

At -140mV I was getting about 12C cooler max temps on the Acer Predator 17 that I ultimately returned (not dealing with uneven core temps because of faulty HS/CPU problem when it's still returnable).

People are talking about it, and it's a known thing (undervolting). There's a lot of threads around here regarding the use of it to work around issues like badly-pasted CPUs or deformed heatsinks or just thin-and-lights that run too hot/too little cooling.

If you are interested in trying this out you may want to peruse the Throttlestop Guide. Caveats: YMMV and no one is responsible if you end up BSODing endlessly but you.

You can also use Intel's Extreme Tuning Utility but many laptops lock voltage access so if those options are greyed out for you, Throttlestop and other similar programs are the alternative.