Comparison of AMD Radeon RX 660M video card vs Intel Iris Pro Graphics P580 video card by specifications and benchmarks. AMD Radeon RX 660M runs at 1.900 GHz base clock speed and has 8 GB of memory, while video card Intel Iris Pro Graphics P580 runs at 0.350 GHz base clock speed and has 64 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.