Question Default to High Performance Graphics Card

I'm trying to force the user to use the best performing graphics card when starting my game. I read that this can be achieved through the following global variables. Currently, I am creating a native plugin with these defined and adding the dll to plugins. I have verified that the resultant plugin is successfully built and can be called through my C# code.

Code (CSharp):

1. #ifdef _WIN32
2. #define DLLExport __declspec(dllexport)
3. #include <windows.h>
4. extern "C"
5. {
6.     //Tell Nvidia/AMD to use high-performance graphics card
7.  
8.     //Nvidia specifies this in their Optimus rendering specs.
9.     //http://developer.download.nvidia.com/devzone/devcenter/gamegraphics/files/OptimusRenderingPolicies.pdf
10.     DLLExport DWORD NvOptimusEnablement = 0x00000001;
11.  
12.     //AMD Specifies this in a tutorial doc for selecting the best graphics device
13.     //https://gpuopen.com/learn/amdpowerxpressrequesthighperformance/
14.     DLLExport int AmdPowerXpressRequestHighPerformance = 1;
15.  
16.  
17.     DLLExport int GetNvOptimusEnablement() { return NvOptimusEnablement; }
18.     DLLExport int GetAmdPowerXpressRequest() { return AmdPowerXpressRequestHighPerformance; }
19. }
20. #endif

However, I am still getting reports that this is not working. I was wondering if this approach is correct, and if not if there is something else I must do.

 

Hey Tautvydas-Zilys, thanks for the reply. This is for windows.

 

Apologizes, yeah its for Windows Standalone player. I don't have logs but I do have a description of an internal user's steps.

"I changed the preferred graphics to integrated (there's a motherboard setting you can set to IGD or PEG which is integrated vs pcie) so I had one monitor plugged into the motherboard and one still plugged into the GPU. I ran some other games as a quick check, and they would only run on the display plugged into the GPU."

If the user specifies preference on their motherboard does that override the selection preference?

 

Here's the game log file as requested

 

Hey Tautvydas - thanks for bearing with me here, I really appreciate your insight. Here's the response I got -

"Looking at this again, even though it's still shown as switching between GPU-0 and GPU-1 in task manager, the game is probably only running on GPU-0 (integrated graphics) as it runs only on the display plugged into the motherboard and shows GPU-0 having consistently high power usage."