Most powerful PC in the world won't help you stream if
- your PC 95%+ tasked before stream related workloads
- your network isn't adequate
- Your OBS Studio settings conflict with your OS and H/W setup
Issue most likely isn't PC specs
- make sure OBS Studio settings are appropriate (beware YouTube videos by idiots who fail to provide context, and their recommendations won't work)
- make sure your Operating System isn't a mess (amazing how many folks allow auto-run processes to keep running when planning to do some computationally intensive work like game play by real-time video encoding for streaming)
- Make sure your OBS screen/video capture settings are appropriate for your setup... this is NOT simple/easy stuff. sometimes it just works... but don't count on that being normal
- All of the above won't help if your network connection is a PoS or otherwise occupied. Download speed tests are meaningless. Typical consumer focused Upload Speed test are highly optimistic and NOT representative of realistic base threshold for streaming.
real-time monitoring of hardware resource utilization on your PC to make sure it isn't the bottleneck, then LAN and WAN, will be likely required troubleshooting steps... as covered ad naseum in this forum
also, best to NOT ignore pinned post in this forum about posting OBS Studio log when asking for support