Comparison of ASUS Phoenix Radeon RX 550 2G EVO video card vs GIGABYTE Radeon RX 580 Gaming 8G video card by specifications and benchmarks. ASUS Phoenix Radeon RX 550 2G EVO runs at 1.100 GHz base clock speed and has 2 GB of GDDR5 memory, while video card GIGABYTE Radeon RX 580 Gaming 8G runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory. The TDP of the first video card is 50 W, and the second is 185 W. Compare the table of benchmark results to find out which graphic card is better.