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.