Comparison of AMD Radeon R7 - 512 (Bristol Ridge) video card vs AMD Radeon RX 660M video card by specifications and benchmarks. AMD Radeon R7 - 512 (Bristol Ridge) runs at 1.110 GHz base clock speed and has 2 GB of memory, while video card AMD Radeon RX 660M runs at 1.900 GHz base clock speed and has 8 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.