what are you talking about lol ? unless ati released new drivers but in the guru 3d tests that they did, the core 216 even beat the 4870x2 in Dead space. Did they update the drivers or something ?
8.12 brought lots of performance increases in the newer games. And even if the 4870 doesn't destroy the 216 nin DS, it does in GRID, COD4, Age Of Conan...