Comparison of Intel Iris Pro Graphics P580 video card vs Intel Iris Plus Graphics 645 video card by specifications and benchmarks. Intel Iris Pro Graphics P580 runs at 0.350 GHz base clock speed and has 64 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.