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A: Using 7-Zip on a CHD file, you can reach 242 MB . Any smaller than that and you are deleting the intro movie or downsampling the audio – which is not "better."
| Format | Compression Ratio | Speed | Best For | Verdict for Rumble Racing | | :--- | :--- | :--- | :--- | :--- | | | None (4GB) | Slow | Physical burning | ❌ Avoid | | CSO (Max) | 85-90% (500MB) | Medium | PCSX2 on Old PCs | ✅ Good | | CHD | 92-94% (280MB) | Very Fast | Modern PCSX2, RetroArch, Batocera | 🏆 BETTER | rumble racing ps2 iso highly compressed better
A standard 4GB ISO is a relic. A 280MB CHD file is a modern marvel. You can store this game on your phone, your USB stick, or even email it to a friend (please don’t). It loads faster, runs smoother, and retains every crash, boost, and victory dance. A: Using 7-Zip on a CHD file, you can reach 242 MB