Running Monitor and Oculus Rift S from 2 different GTX 1070's, way to make it work?

[Dukmiester2]

So, I just got an Oculus Rift S VR set. I initially had the Display port cord in the SAME GPU as my PC monitor is plugged into. It all works fine, but when I launched No Man's sky in VR mode, I noticed my display settings were set down to a lower setting than what I had set them to when I was playing in "non-VR".

So, I put them all back up to Ultra and re-started NMS. The performance was noticeably worse.

Since I have 2 1070's, and hardly any games are using SLI anymore, I tried disabling SLI and plugging my Rift S into my other 1070. Figured I could "dedicate" one of my 1070's to just powering my VR headset, and have the other one to power my Monitor.

The Oculus VR "demo" (First Contact, the one with the WAL-E looking robot) seems to work just fine.

Steam VR seems to load up just fine.

When I launch NMS, however, it just said "Waiting" for a while, so I brought up the Steam VR Desktop interface, and it said:

"plug your headset into the same graphics card as your primary monitor"

Is there any way to get around this? Is it even possible to have separate graphics cards: one for VR, one for Monitor?

Am I better off just dropping the settings back down and plugging the VR back into the same GPU as my monitor?

If so, are there any recommendations for squeezing out some better Framerates while still keeping the NMS in-game settings set to Ultra?

I looked in the NMS In-game video settings, and can not seem to find any adjustment for resolution. I'd be willing to reduce the display resolution to see if it would help, but can't seem to find out how to do that. My monitor is 1080p, so I am assuming NMS is rendering at that in VR too.

This is all very new to me,
so any help would be greatly appreciated.

[Mio Rin]

In the Nvidia Control Panel, you can dedicate/prioritize the second GPU to PhysX and CUDA processing, which should free up some resources for the primary GPU to focus on the visual stuff.

I have a secondary 1060 set up like that to supplement the primary 2080 for demanding games and to handle the encoding for Steam's Remote Play feature.

[Dukmiester2]

Hey, thanks for the reply. I have disabled SLI and dedicated my second card to physX and was hoping to drive my Rift S off the second card, leaving the primary card to drive my main monitor.

I've since come to realize, that is apparently not advised. I ended up plugging my headset back into my main GPU, same as my Monitor.

Did find, however, a setting buried somewhere in one of the Steam menus while in Steam VR that allowed me to change the "target resolution" from 1080p to 720p.

My desktop display is 1080p and I was really worried I'd notice the difference in VR going from 1080p to 720p, but honestly I can not tell the difference.

I don't know if that setting in steam made ANY difference to how No Man's Sky is rendered or not, and I am not 100% sure changing that setting in Steam from 1080p to 720p makes NMS render any different at all.

May have been pure coincidence that now NMS seems to run better, I don't know. I was doing a lot of testing, switching plugs around, starting and stopping VR and maybe that was making NMS into a near slide-show.

I've since been playing it for several hours, and it seems to be running pretty good, so I'll be leaving that Steam Setting at 720p for now.

I'd be interested if anyone knows if that setting I found is JUST for the Steam VR interface or if it actually affecting how games are rendered that launch through Steam VR.

If I can figure out how to do it IN VR, I'll try to get a screen capture of that setting page so it is more clear as to what setting I am referring to.

Thanks again for any tips,

I really do appreciate it :)

[Sylas]

use the oculus tray tool to determine what your rez is..Most likely you are NOT in 720p mode in the headset. Maybe your monitor, but it would look pretty bad if your HMD were displaying at that rez.