Intro
The goal of this post if to gather as much information as possible about the CS2 graph. I'm facing most of the issue that you guys have, i am in the same situation as you; but let's try to keep this post as constructive / informative as possible and please no rent on how bad the game is, etc. If you have no data to share; please avoid commenting.
My situation
In my situation since i got fiber I noticed that in the CS2 Margin Graph i have frequent yellow lines, those were not present when i had coax cable. The more yellow lines the less responsive my input feels (delayed strafe on keyboard) and delayed mouse input, in general everything will be delayed. Both my jitter are at 0ms straight lines but the gameplay feels very choppy and delayed, even though i have 500+ FPS on a 360Hz Zowie monitor.Data
In order to test and have the full pictures inside CS2 go to :Your settings --> Game --> scroll at the bottom --> put ALWAYS on the 5 settings in Telemetry or apply those 4 commands in CS2 console
cl_hud_telemetry_frametime_show 2
cl_hud_telemetry_ping_show 2
cl_hud_telemetry_net_misdelivery_show 2
cl_hud_telemetry_serverrecvmargin_graph_show 2
Here are my results :
- Fiber
- 1.png (23.18 KiB) Viewed 3396 times
If you are on fiber or you think you have CS2 issues related to network please apply the commands and check the Margin Graph (should be the lowest graph on top right corner of your monitor) and share the results here.make sure that you test on multiple server and locations. My results are the same no matter the server and location.
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FOR ANYONE READING IN THE FUTURE; HERE IS THE CONCLUSION
vnb wrote: ↑15 Nov 2025, 00:21OKAY
Very important update! :
I found the culprit to my issue : upstream UDP jitter
Here is the proof :
- upstream jitter capture.PNG (139.04 KiB) Viewed 1825 times
So even though my XGS-PON Fiber connection is 2Gbp/s UP and Down capable, this is only a 100mbp/s symmetrical test.
As you can see the result above the RX latency (downstream) stays under 1 ms but the TX latency (upstream) is never below 10ms and the value varies a lot which is not good. So waveform bufferbloat and most other "tools" to measure latency are not giving us the full pictures and can somehow overshadow the "raw results" of your ISP... Case closed. Now time to "fight" with my ISP wish me luck
Conclusion
well good news if you have the same issue as me (too much yellow lines low in height in cs margin graph) even tho you have no packet loss or bad network values in game, well the issue is
ftth doesnt mean the provider as enough bandwith. And can you past your full setup for cs2 
