Comparison of Intel Iris Plus Graphics 645 video card vs AMD Radeon HD 7640G video card by specifications and benchmarks. Intel Iris Plus Graphics 645 runs at 0.300 GHz base clock speed and has 32 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.