I don't think people care enough about fanless laptops, of which there are a few. And companies seem to really love penny pinching when it comes to the heatsink, which would have to be way bigger and/or better designed - that's almost out of the realm of known physics when it comes to HP, Dell and Lenovo :D
You could go "fanless" on many laptops, though. You'll have to check beforehand, but all you need is TDP adjustment (and ideally, undervolting) support and the ability to turn off the fan or adjust the speed table with something like NotebookFanControl.
For TDP/TPL/voltage adjustments, use Throttlestop on Windows; Linux also has some tools or you can write to MSRs directly after a long night of figuring them out. AMD mobile chips can not be undervolted as of right now, btw, a real shame. But neither can Intel with Plundervolt mitigations, so that's a double real shame.
A Core i7 can go up to ~20W without turning the fan on, and higher with the fan at minimum (I doubt you'll hear it). The critical temperature (=fan at full speed, overriding settings) is usually over 80 degrees Celsius, which is high enough that it may never get there.
Using better thermal paste would be highly desirable, too.
The major disadvantage is obviously performance - you'd get half of whatever the chip offers, at best.
You could go "fanless" on many laptops, though. You'll have to check beforehand, but all you need is TDP adjustment (and ideally, undervolting) support and the ability to turn off the fan or adjust the speed table with something like NotebookFanControl.
For TDP/TPL/voltage adjustments, use Throttlestop on Windows; Linux also has some tools or you can write to MSRs directly after a long night of figuring them out. AMD mobile chips can not be undervolted as of right now, btw, a real shame. But neither can Intel with Plundervolt mitigations, so that's a double real shame.
A Core i7 can go up to ~20W without turning the fan on, and higher with the fan at minimum (I doubt you'll hear it). The critical temperature (=fan at full speed, overriding settings) is usually over 80 degrees Celsius, which is high enough that it may never get there.
Using better thermal paste would be highly desirable, too.
The major disadvantage is obviously performance - you'd get half of whatever the chip offers, at best.