Not really familiar with OBS and Live Plugin but I am good at googling information.
Is this the Live Plugin you are using: https://support.streamelements.com/hc/en-us/articles/18771457842066-SE-Live-Overview
Supported Platforms
SE.Live is currently only supported on Windows operating systems. Support for SE.Live on Mac operating systems has been discontinued.
FAQs
- Q: Can I use SE.Live to stream to multiple platforms?
A: SE.Live itself does not enable multi-platform streaming. However, it does provide multi-platform chat functionality via the multi-chat dock, allowing you to view and chats from different streaming platforms within OBS.
- Q: What happens if I have issues with OBS and SE.Live?
A: We recommend that you take a look at our dedicated article about SE.Live Troubleshooting where we cover possible solutions to multiple common issues.
From the link from above website: https://support.streamelements.com/hc/en-us/articles/10474479415442-SE-Live-Troubleshooting
See if any of those issues concerns what is happening with your Live plugin.
Note: The Live Troubleshooting website has a Online Help CHAT that you might want to try and ask for their help.
Possibly it could be due to your fairly old CPU and powerful GPU Card. Just guessing though.