Comparison of AMD Radeon HD 7400G video card vs AMD Radeon RX 680M video card by specifications and benchmarks. AMD Radeon HD 7400G runs at 0.330 GHz base clock speed and has 1 GB of memory, while video card AMD Radeon RX 680M runs at 2.000 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.