GBI SR for GB GBC: use this for GB and GBC games! GBI SR for GBA: use this for GBA games! GBI HF optimized: this is the optimal GBI-version for use with the PixelFX RetroGEM! Use this for GB, GBC and GBA games! To use this GBI-version optimally you'll need to adjust some settings in the RetroGEM OSD (On-Screen-Display). Open up the OSD by using L + R + DPad-right + X - In the menu under "System" and "GCDigital Settings", set "Chroma Interp." to off and "Use console DE" to on (1:1 PAR). - In the menu under "Video" and "Direct Mode", make sure "Standalone mode" is selected (default). - In the menu under "Presets", select "Restore default settings". - Optional: In the menu under "Video" and "Scaler", set "Zoom" to zoom input to full output height (fill).