After flashing a custom image, the difference is noticeable but not miraculous.
RetroRoller (a Linux-based OS for RK3128 devices) is the closest you will get to CFW. Some users have flashed the RGB20 version of RetroRoller onto an A20 SD card. powkiddy a20 custom firmware
Let’s look at real-world improvements. (Tested on a standard Powkiddy A20 with a 1.3GHz RK3128, 512MB RAM). After flashing a custom image, the difference is
| Console / Game | Stock Firmware | RetroOZ (CFW) | ArkOS (CFW) | | :--- | :--- | :--- | :--- | | PS1 - Crash Bandicoot | 40-50 FPS (audio crackle) | 60 FPS (Full speed) | 59-60 FPS | | N64 - Super Mario 64 | 15-25 FPS (unplayable) | 25-30 FPS (playable with frameskip) | 28-30 FPS (smoother) | | GBA - Metroid Fusion | 55 FPS (stuttering) | 60 FPS (Perfect) | 60 FPS | | Dreamcast - Sonic Adv | 10 FPS (slideshow) | 15-20 FPS (proof of concept) | 18-22 FPS | | Boot Time | 45 seconds | 28 seconds | 18 seconds | Let’s look at real-world improvements
As the table shows, CFW turns PS1 from a painful experience into a flawless one and makes GBA games run with zero frame drops.
Insert the SD card (do not click it in). Press and hold Volume Down (-) while pressing the Power button. Hold Vol Down until you see the ArkOS boot logo.