Comparison of PowerColor Red Dragon Radeon RX 550 2GB GDDR5 video card vs XFX Radeon RX 550 4GB Core Edition video card by specifications and benchmarks. PowerColor Red Dragon Radeon RX 550 2GB GDDR5 runs at 1.019 GHz base clock speed and has 2 GB of GDDR5 memory, while video card XFX Radeon RX 550 4GB Core Edition runs at 1.100 GHz base clock speed and has 4 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.