Comparison of AMD Radeon HD 8400 video card vs AMD Radeon HD 6320 video card by specifications and benchmarks. AMD Radeon HD 8400 runs at 0.600 GHz base clock speed and has 2 GB of memory, while video card AMD Radeon HD 6320 runs at 0.510 GHz base clock speed and has 1 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.