The PlayStation 3 (PS3) is the third major console release in Sony's PlayStation line of game consoles.
The first notable difference between the two is the optical drive. While the PS2 had a tray-loading CD and DVD drive, the PS3 uses a slot-loading drive that supports CD, DVD, and the new Blu-ray optical format.
The PS3 has a new GPU, the nVidia RSX, that is far more powerful than the proprietary "Graphics Synthesizer" that the PS2 used. The PS3 generally has better support for high-definition video, whereas many PS2 games only supported low-definition interlaced video.