Pretty much all monitors these days use an LED backlight.
And all LED backlit monitors use an LCD screen.
They are two different components in the same monitor...
Yeah, assuming you have a good fan controller, you should be able to run them much slwoer.
Even half speed will be loud though, but maybe that's just me.
I run my fans at 500rpm
Even an RTX3080 doesn't use full 16x bandwidth.
This card has such low performance that it is perfectly fine and not bottlenecked with 8x.
You could probably even run it at 4x without any performance decrease too.
There are many hidden files and folders that the OS uses.
You have to show hidden files in file explorer if yo want to see them.
Use windirstat to see everything at once.
Look for something with low latency and good colours.
A few years ago I bought a 55" NU7100 series from Samsung, 4k 60Hz.
Now you can find stuff better though.