Question / Help Huge FPS drop on i7-7700K

Trabulos

New Member
Hello guys,

first of all excuse my bad english or mistakes I did while posting my first thread. I read everything in the guideline for dropping FPS, but it seems it is all about network issues. My network is not the problem, it's the encoder.

I run a twitch channel, playing PUBG only. I stream with OBS 21.0.1. I am not an affiliate or real twitch partner, so I don't have transcoding enabled on my channel. Because of this I try to get the best quality on 720p/60.


Hardware:
Intel Core i7-7700K (OC at 4600 MHz)
inno3D GTX 1080 (OC at 1971 MHz)
16 GB DDR4 (2400 -> OC to 3000)
PUBG, OS and OBS is installed on an NVMe SSD
Windows 10

I get about 100-140 FPS on PUBG at 1440p resolution. I stream with a resolution of 720p/60. I heard, that the x.264 codec should be the best option for quality purposes. When I run NVIDIAs NVENC Encoder, I dont lose much frames at all. But when I tried to use the x.264 codec, my FPS dropped from 100-120 FPS down to 50-70 FPS. On a 165 Hz display, you notice this very hard. It seems to be very laggy.

I don't really understand, why my i7 runs "this bad" on the x.264 codec. Is it because he only has 4 real cores?


Settings:
Rescaling: OFF (because I just set my resolution in video tab to 720p on both drop-downs.
x.264 - CBR - 6000 - Keyframe: 0 - CPU: medium - Profile: high - Tune: nothing
OR
NVENC - CBR - 6000 - Keyframe: 0 - Low latency, high quality - Profile: main - Level: auto - Two-Pass-Encoding: OFF - GPU: 0 (don't know, what this exactly is) - B-frames: 2

Other Settings:
PUBG is running at 1440p.
Video Tab: Basic Resolution: 720p - Scaled Resolution: 720p - Lanczos 32 - FPS: 60

I know, you don't know my whole PC, but maybe you have some tips or advices for me to achieve the best quality. Thank you very much! If you have some more questions, please feel free to ask :)

Best regards
Trabulos
 
Last edited:
So what happens when you do very fast preset on x264? I mean quality wise that's already better than NVENC So there is really no need to push the encoder any further unless you got dedicated streaming PC
 
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