This is tricky. A stock PSP cannot read CHD. However, if you have a PSP with or PRO-C2 custom firmware and a plugin called chdreader.prx (experimental), you can play CHDs from the memory stick. Warning: The PSP’s CPU (333Mhz) struggles with CHD decompression. For real hardware, stick to ISO or low-compression CSO. CHD is better for emulation, not necessarily original hardware.
Whether you want help finding specifically for your platform?
Unlike CD-based games, PSP games must be compressed using the with a specific hunk size for best performance in PPSSPP. Easily Convert PSP ISO To CHD For PPSSPP psp chd internet archive better
While ISO is the traditional standard and CSO was the historical choice for memory-starved hardware, has emerged as the definitive champion for modern emulation. The Big Three: PSP File Formats Explained
Do you run CHD on your Steam Deck or phone? Let us know your compression ratios in the comments below. This is tricky
Many older Internet Archive collections rely heavily on the CSO format. While CSO files are small, they suffer from terrible read speeds. When playing a CSO game on an emulator like PPSSPP, you may experience audio skipping, micro-stuttering, or lengthy loading screens because the emulator is struggling to decompress the data in real-time. CHD compresses files just as tightly as CSO (and often tighter) but decompresses with significantly less CPU overhead, ensuring butter-smooth gameplay. 5. Seamless Modern Emulator Support
CHD (Compressed Hunk of Data) is a compressed format for storing and distributing ROMs and game data. The Internet Archive (IA) is a digital library that provides universal access to cultural heritage, including video games. Warning: The PSP’s CPU (333Mhz) struggles with CHD
If you use (on PC, Android, or iOS), CHD support is now baked in. You don't need to do any extra setup; simply point the emulator to your CHD folder. This makes it an ideal format for cross-platform play, as the same file will work seamlessly across all your devices. How to Get Started