Comparison of AMD Radeon Pro W6400 video card vs ASRock Phantom Gaming Radeon RX 550 2G video card by specifications and benchmarks. AMD Radeon Pro W6400 runs at 2.331 GHz base clock speed and has 4 GB of GDDR6 memory, while video card ASRock Phantom Gaming Radeon RX 550 2G runs at 1.100 GHz base clock speed and has 2 GB of GDDR5 memory. The TDP of the first video card is 50 W, and the second is 50 W. Compare the table of benchmark results to find out which graphic card is better.