Comparison of ASRock AMD Phantom Gaming X Radeon RX 570 4G OC video card vs Sapphire Pulse Radeon RX 570 8GD5 video card by specs and benchmarks. 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, while video card Sapphire Pulse Radeon RX 570 8GD5 runs at 1.194 GHz+ 2 % base clock speed and has 8 GB of GDDR5 memory. The weight is different, -- vs --. The TDP of the first video card is 150 W, and the second is 150 W . Compare the benchmark results to find out which video card is better.