Comparison of ASUS Phoenix Radeon RX 550 4G EVO video card vs MSI Radeon RX 580 Gaming X+ 8G video card by specs 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 MSI Radeon RX 580 Gaming X+ 8G runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory. The weight is different, -- vs 978 g. The TDP of the first video card is 50 W, and the second is 185 W . Compare the benchmark results to find out which video card is better.