Comparison of AMD Radeon RX 680M video card vs Intel Iris Plus Graphics 645 video card by specs and benchmarks. AMD Radeon RX 680M runs at 2.000 GHz base clock speed and has 8 GB of memory, while video card Intel Iris Plus Graphics 645 runs at 2.000 GHz base clock speed and has 32 GB of memory. The weight is different, -- vs --. The TDP of the first video card is --, and the second is -- . Compare the benchmark results to find out which video card is better.