I've been seeing updates that GammaOS 1.4 is coming out for a bunch of retro handhelds. I put it on my RG477V when I first got it, but lately switched back to stock to firmware. Has 1.4 been released for the RG477V?
Before anything MUTE the video as it seems for some reason recording while gaming really screws up the audio with crackles but while gaming no audio issues. My rg 477v is on GammaOSNext with Balanced performance...recording audio is even worse crackles in Max power and power saving tanks gaming performance - no idea how to fix this yet.
Anyway as you can see rg 477v even WITH the screen+audio recording can hold a very respectable framerate (better without screen recorder). This is a install of version 0.0.2 with stock settings << yep the second release and already performing pretty well. All on stock settings(just changed to 4:3) with vulkan.
https://github.com/sashkinbro/EmuCoreC/releases
Thought a video is better than some screenshots. Also have tried Tekken DR and Soldner X2 - both stays solid 60fps. So give it a try and see how it goes for your game(s).
Feels so good that I'm playing my favorite childhood video game console V-Tech VSMILE one of my all time favorite video game console.