Radeon HD 4870:
Radeon HD 4850:Stream processors: 800 Core: 750MHz Memory: 512MB GDDR5 @ 3600MHz Memory bus: 256-bit Memory bandwidth: 107GB/s
Stream processors: 800 Core: 625MHz Memory: 512MB GDDR3 @ 1986MHz Memory bus: 256-bit Memory bandwidth: 72.96GB/s