Comparison of Intel UHD Graphics 620 video card vs Intel Iris Plus Graphics 645 video card by specifications and benchmarks. Intel UHD Graphics 620 runs at 0.300 GHz base clock speed and has 16 GB of memory, while video card Intel Iris Plus Graphics 645 runs at 0.300 GHz base clock speed and has 32 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.