Comparison of Intel Iris Pro Graphics P580 video card vs AMD Radeon HD 8400 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 AMD Radeon HD 8400 runs at 0.600 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.