One of the most useful rules of thumb in live streaming is the 1.5x rule. Your upload speed should be at least 1.5 times — ideally 2 times — the bitrate you plan to stream at. That headroom is what absorbs the normal fluctuation every internet connection has, and it is the difference between a professional-looking stream and a laggy one.
For 1080p 60 fps at 6,000 Kbps, that means 9 to 12 Mbps of upload as an actual target. Some cable plans deliver that on paper but not always in practice. Fiber almost always does. Wi-Fi complicates things further, because wireless connections introduce their own jitter on top of the ISP-level variability.
The professional-grade setup for streamers is a fiber plan with symmetric upload, a wired Ethernet run to the streaming PC, and OBS configured to record locally at higher bitrate while streaming at a conservative bitrate. That way your VOD stays sharp even if the live feed had to run lean for stability. For a full walkthrough of the 1.5x rule and how to set up an OBS bitrate that will actually stay stable, this GameSpeedHub guide to Twitch streaming upload speed for 1080p60 is a good technical reference.
