Question / Help Extreme amounts of encoding lag with NVENC

[Chetyre]

Hello.

I'm running on Windows 10 (i7 3770, GTX970 x 2 - not in SLI)

I'm trying to record, not stream, Final Fantasy XIV, by playing on 1 card (my GPU usage is 30% on average, constant 60 FPS with VSYNC on), and encoding on the other card (some other games are way more GPU intensive than this one), but I have over 70% frames lost when using NVENC, no matter the GPU I use, or the capture method I'm using.

I've been trying to figure this one out for a long time now, so I hope someone can shed some light on this.

 

[Harold]

Remove the second 970 physically and change the nvenc gpu selection back to 0

 

[Chetyre]

That's a good way to debug it I guess, but don't you think that's completely counter productive to what I want to do?

 

[Harold]

You want to cripple the available pci-e bandwidth to your primary card, reducing both game and obs performance, to use nvenc on a second card that doesn't actually help your performance because 9-series nvenc operates on dedicated components.

 

[Chetyre]

That makes sense, I never actually considered pci-e bandwidth usage to be a possible bottleneck, but in the case wouldn't it be better to just reenable SLI and use Quicksync? would that work?

 

[Harold]

No it wouldn't. You're screwing over OBS' ability to fully capture all frames by enabling SLI.