Comparison of AMD Radeon HD 8250 video card vs AMD Radeon HD 7640G video card by specifications and benchmarks. AMD Radeon HD 8250 runs at 0.300 GHz base clock speed and has 2 GB of memory, while video card AMD Radeon HD 7640G runs at 0.500 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.