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Seeing how the Intel HD Graphics 4000 is covering all my needs perfectly for the moment, I would prefer to disable the NVIDIA dedicated GPU in my Lenovo Z400 for a while.
I've already went to the control panel and set the Global Settings for integrated but it still turns on (for a very small amount of time) every now and then.
From my research I would guess I would do it by: (Windows 8):
- Disabling the "NVIDIA GeForce GT 635M" driver in the Device Manager
- Switching from "Switchable Graphics" to "UMA Graphics" in the UEFI settings
I would like to know/confirm if:
- "UMA Graphics" means the Intel HD Graphics 4000 in my case
- The NVIDIA GPU will not actually turn on and generate heat/consume energy, just not be used
- The process is reversible/safe
Specs:
Laptop: ideapad Z400
OS: Windows 8.1 (64 bit)
CPU: Intel i7-3520m (w/ Intel HD 4000)
GPU: NVIDIA GeForce 635m
RAM: 8GB @ 800 Mhz
PS: This is a double from the post I made at the lenovo forums.
Of course the process is safe. Of course it can be reversed. Yes that's the setting you want. But just limit installing the drivers that support switchable graphics is an easier solution. – Ramhound – 2014-05-22T19:54:00.053
Helps if you understand what UMA stands for.
– Ramhound – 2014-05-22T20:05:38.713