This is a fix for your low fps legacy client.
This will allow you to choose which gpu to run your game(s) through on windows 10 and hopefully get rid of the fps client lag. It worked for me.
link below with pictures
How to Choose Which GPU a Game Uses on Windows 10
Hope this helps!
I just downloaded the clients from the RS site and ran them both. Neither of them have actually launched. They both launch and load to 3% before giving me the "Error saving file" error. To troubleshoot I've uninstalled and reinstalled, removed the Jagex cache file, running as admin, and...
