Question / Help stuttering/pixelation while streaming csgo

[Verse]

i really cant find good settings to stream csgo without stuttering or pixelation if i use my x264 encoder i stutter if i use nvec it runs smooth but looks like crap

specs are i7-6700k @4ghz and a gtx 1070 fe my internet is 170down and 16 up wired

my normal stream settings are nvec , rescale @ 1280x720 60fps , rate CBR , bitrate 4300 , keyframe interval 2 seconds , preset low-lantency high quality , level auto ,gpu 0 ,b frames 2

LOG https://hastebin.com/medavecegi

anything i can change or something to make it look better? i am a noob when it comes to this and id really love to stream more but the poor quality really bums me out

 

[Verse]

whenever i try and stream x264 it stutters every 4 seconds

 

[BK-Morpheus]

20:03:26.135: [NVENC encoder: 'streaming_h264'] settings:
20:03:26.135:     rate_control: CBR
20:03:26.135:     bitrate:      4300
20:03:26.135:     cqp:          0
20:03:26.135:     keyint:       120
20:03:26.135:     preset:       llhq
20:03:26.135:     profile:      high
20:03:26.135:     level:        auto
20:03:26.135:     width:        1920
20:03:26.135:     height:       1080
20:03:26.135:     2-pass:       true
20:03:26.135:     b-frames:     2
20:03:26.135:     GPU:          0

20:02:34.505: video settings reset:
20:02:34.505:     base resolution:   1920x1080
20:02:34.505:     output resolution: 1280x720
20:02:34.505:     downscale filter:  Lanczos
20:02:34.505:     fps:               60/1
20:02:34.505:     format:            NV12
20:02:34.505:     YUV mode:          601/Partial

Not sure, why NVENC is set to 1080p, while video settings are 720p.
Nevertheless, NVENC is sligthly worse than x264 (very fast preset) in terms of encoding features and compression efficiency.
720p 60fps with 4300kbit/s will pixelate/blur quite often in fast games.

Things that will reduce pixelation:
- less resolution
- lower frame rate
- higher encoder efficiency (x264 faster preset for example)
- more bitrate
- less ingame details / movement