Question / Help Playing 4k, streaming 1080/60. Low FPS on OBS.

[FightinCowboy]

Hey y'all. So I've been streaming without issue for a bit over 3 years now. Recently got a 4K monitor so I've been playing in 4K while continuing to stream in 1080/60. The problem I'm experiencing in particular is with OBS not being able to process the downscaling (I think). On my end the game is running in 4K perfectly fine but in the bottom right corner of OBS were it shows CPU usage and current FPS, I'm averaging around 20-30 fps at times. Note that this only happens if I'm playing 4K while trying to stream 1080/60 simultaneously. Doing a local recording I don't see the same FPS dips.

If there a setting somewhere I'm overlooking that could help address this? Is it perhaps just time to update my CPU? Any recommendations of a solution would be appreciated. I've attached a log of the last stream I did while playing at 4K and then a log of a test stream where I changed native resolution down to 1080.

Stream example (playing 4K/log 1): https://www.twitch.tv/videos/185352714
Stream example (playing 1080/ log 2): https://www.twitch.tv/videos/185419454

Local Recording example (playing 4K): https://www.youtube.com/watch?v=93n95zq9nn0

PC Specs: I7 5820k OC @4.4ghz, 32gb RAM, Aorus GTX 1080 Ti

 

[BK-Morpheus]

I see an GPU overload which would fit perfectly to the circumstance that this problem started to occur with higher ingame resolution and therefore more GPU load.
Try to limit the game to 60fps and reduce details until the GPU load stays under 80% while OBS is opened. Than try to record/stream again.

 

[FightinCowboy]

I never would have even thought a 1080ti could hit overload but I am using NVEC instead of regular 264 as this game has been molesting my processor. I've since limited to 60 FPS in game but the frame drops still happens while streaming if I'm playing 4k and streaming 1080.

One solution I've found is an in-game setting that modifies the resolution down by 50% (so it's like playing in 2K instead of 4K i guess?). Never seen this in a game before but the description is "Allows rendering resolution independent of window size. Use higher resolution scale to increase display details. User lower resolution scale to increase performance."

 

[TryHD]

the game renders in 1080p with this settings, than it gets upscaled and captured by OBS and after that again downscaled to 1080p. That makes no sense at all. Just play at 1080p and avoid the quality loss caused by all the scaling.

 

[FightinCowboy]

the game renders in 1080p with this settings, than it gets upscaled and captured by OBS and after that again downscaled to 1080p. That makes no sense at all. Just play at 1080p and avoid the quality loss caused by all the scaling.

It may make no sense but I avoided dropping frames doing it, don't know why but it worked.

Also a different problem is 1080 isn't working properly on my 4K monitor. Fullscreen makes shit go haywire, windowed won't adjust properly in OBS, and borderless window takes up a quarter of my screen visually while leaving the rest black..

Setting the 4k monitor resolution to 1080 worked as a solution but I'd prefer to avoid doing that everytime I'm going to play this one game.