Comparison of ASUS Phoenix Radeon RX 550 4G EVO video card vs AMD Radeon RX 6400 - Reference Data 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 AMD Radeon RX 6400 - Reference Data runs at base clock speed and has 4 GB of GDDR6 memory. The TDP of the first video card is 50 W, and the second is 53 W. Compare the table of benchmark results to find out which graphic card is better.