VR SLI setting won't work correctly

[francis.lavergne]

Hello,

I have two Nvidia GeForce GTX 1080 on my computer, and I'm trying to use both of them with the Vr Oculus template, using the VR SLI setting.

It seems to work, both graphic cards has a GPU load of 60-70%. (it was previously 60-70% on only one of them) However, I get some really weird graphic bugs... (all the transparent materials are not transparent, reflections are strange, and I have some flickering and noise going on...)

In my settings.ini file, I added disable_implicit_sli = true and nv_vr_sli_enabled = true. Like this:

win32 = {
	window_name = "Stingray VR Project"
	floating_point_exceptions = true
	renderer = {
		screen_resolution = [1280 720]
		adapter_index = 0
		fullscreen_output = 0
		fullscreen = false
		aspect_ratio = -1
		d3d_debug = false
		disable_implicit_sli = true
	}
	
	render_settings = {
		vr_supported = true
		vr_hmd_resolution = [2160 1200]
		vr_target_scale = 1.5
		vr_mirror_mode = "mono"
		nv_vr_sli_enabled = true
	}

I enabled the SlI setting in the Nvidia control panel, I'm using the most recent graphic drivers, and I'm using 3ds max interactive 1.8.64. (can't find version 1.9 of max interactive...)

I'm not sure what I did wrong... Any help would be very appreciated!

[__ben__]

Do the rendering artifacts occur only in SLI mode? If one of the cards is disabled or removed does the scene render as expected?

[francis.lavergne]

Yes everything is fine when SLI is deactivated. 

I think the problem was that I didn't put the disable_implicit_sli = true at the right place. Should be like below instead.

There are no graphic problems anymore, only now the second graphic card is only used at 5-7%.... Is SLI really changing anything ? 

win32 = {
	window_name = "Stingray VR Project"
	floating_point_exceptions = true
        disable_implicit_sli = true
	renderer = {
		screen_resolution = [1280 720]
		adapter_index = 0
		fullscreen_output = 0
		fullscreen = false
		aspect_ratio = -1
		d3d_debug = false
	}
	
	render_settings = {
		vr_supported = true
		vr_hmd_resolution = [2160 1200]
		vr_target_scale = 1.5
		vr_mirror_mode = "mono"
		nv_vr_sli_enabled = true
	}