Comparison of AMD Radeon R4 (Stoney Ridge) video card vs AMD Radeon HD 7660D video card by specifications and benchmarks. AMD Radeon R4 (Stoney Ridge) runs at 0.660 GHz base clock speed and has 2 GB of memory, while video card AMD Radeon HD 7660D runs at 0.800 GHz base clock speed and has 2 GB of memory. The TDP of the first video card is --, and the second is --. Compare the table of benchmark results to find out which graphic card is better.