Comparison of AMD Radeon R7 - 512 (Kaveri) video card vs AMD Radeon HD 8250 video card by specifications and benchmarks. AMD Radeon R7 - 512 (Kaveri) runs at 0.860 GHz base clock speed and has 2 GB of memory, while video card AMD Radeon HD 8250 runs at 0.300 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.