Comparison of ASUS Phoenix Radeon RX 550 4G EVO video card vs Sapphire Radeon RX Vega 56 video card by specifications and benchmarks. ASUS Phoenix Radeon RX 550 4G EVO runs at 1.100 GHz base clock speed and has 4 GB of GDDR5 memory, while video card Sapphire Radeon RX Vega 56 runs at 1.156 GHz base clock speed and has 8 GB of HBM2 memory. The TDP of the first video card is 50 W, and the second is 210 W. Compare the table of benchmark results to find out which graphic card is better.