Why does the Old 80GB PS3 have worse PS2 backwards compatibility than the 60GB and 20GB versions?
The Old 80GB uses software emulation, while the 60GB and 20GB versions have actual PS2 hardware inside them. As of right now, none of the PS3s are 100% backwards compatible, but the backwards compatibility issues with some games will be corrected over time through system updates. You can [url=http://www.us.playstation.com/Support/CompatibleStatus]check backwards compatibility for the specific PS2 games[/url] if you’re worried as to whether your 20GB, 60GB, or Old 80GB will play it.