Can't switch over to NVIDIA GTX1650 as primary GPU on FX505DT

Hi, I've recently purchased a notebook: ASUS TUF Gaming FX505DT. Which has:
AMD Ryzen 5 Mobile 3550H / 128MB ATI AMD Radeon Vega 8 Graphics / 4095MB NVIDIA GeForce GTX 1650 under Win10 version 20H2 (OS Build 19042.804)


The thing is I managed to install NVIDIA drivers, but I can get it to be the default and primary driver in the computer.


I can see both graphic devices appear correctly in DxDiag


Advanced display settings show Vega 8 as display device


If I disable Vega 8 Graphics from Device Manager... everything becomes a little laggy, lose changeresolution possibility, etc. and Advanced display settings doesn't show NVIDIA gpu as display device


NVIDIA Driver is 461.40-notebook-win10-64bit-international-dch-whql.exe

Also downloaded drivers in Asus site and didn't work.


Display Driver Uninstaller's Clean and reset of NVIDIA GPU, reboot and reinstall same NVIDIA driver as above, results the same.

In NVIDIA Control Panel 3D settings --> "Global Settings" Tab --> Prefered graphics processor, "High-Performace NVIDIA processor" is chosen.


I'm really stuck, here an Imgur album in case you want to check anything:

GXT 1650 doesn't work as primary gpu - Album on Imgur

Thanks in advance!

dalchina said:

You might be fighting Nvidia's Optimus algorithm.
Nvidia Optimus - Wikipedia

Optimus | Technology | GeForce

I.e. much of the time for 'Office' use, say, you don't need a graphics card- only for more intensive applications.
It is not uncommon to find the Nvidia card rarely used.

See too:
Set Preferred GPU for Apps in Windows 10
How to Reset GPU Preferences for Apps to Default in Windows 10
How to Backup and Restore GPU Preferences for Apps in Windows 10

Note: the preferred way to post screenshots as per tutorial is thus:

Thank you really much, this was driving me nuts... Here's more info:

The primary GPU will always be Vega 8. Power hungry apps should be manually assigned to use Nvidia GPU. Check this: How to set default GPU for apps on Windows 10 • Pureinfotech


If you want to, you could enable Turbo mode when needed in Armoury Crate.

its better to use Radeon Vega 8 while idling or office work, less heat and power efficiency.


If you connect your laptop to any external display via the HDMI port, then your GTX should be the display device for the external display. If your games are running by default on the integrated Vega 8 IGPU then you can change it by Right Clicking on the desktop > display settings > graphics settings > then under Graphic performance preference browse your game > select it and then click on options and then select 'High Performance'. This should let you run games on your GTX 1650.