Comparison of GIGABYTE Radeon RX 570 Gaming 8G video card vs ASRock AMD Phantom Gaming X Radeon RX 570 4G OC video card by specifications and benchmarks. GIGABYTE Radeon RX 570 Gaming 8G runs at 1.178 GHz+ 1 % base clock speed and has 8 GB of GDDR5 memory, while video card ASRock AMD Phantom Gaming X Radeon RX 570 4G OC runs at 1.194 GHz+ 2 % base clock speed and has 4 GB of GDDR5 memory. The TDP of the first video card is 150 W, and the second is 150 W. Compare the table of benchmark results to find out which graphic card is better.