Comparison of ASRock AMD Phantom Gaming X Radeon RX 570 8G OC video card vs Sapphire Pulse ITX Radeon RX 570 4G G5 video card by specifications and benchmarks. ASRock AMD Phantom Gaming X Radeon RX 570 8G OC runs at 1.168 GHz base clock speed and has 8 GB of GDDR5 memory, while video card Sapphire Pulse ITX Radeon RX 570 4G G5 runs at 1.168 GHz 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.