sentences:  In summary, early PS3 consoles such as the 60GB and 20GB launch PS3 consoles were backwards compatible with PS2 games because they had PS2 chips in them.Some later models, most notably the 80GB Metal Gear Solid PS3 consoles are also backwards compatible, through partial software emulation in this case since they no longer had the PS2 CPU in them, although they do have the PS2 GPU in them, allowing for reduced backward compatibility through hardware-assisted software emulation.All other later models, such as the PS3 Slim are not PS2 backwards compatible, though users can still enjoy PS3 and PSone games on them.