Comparison of ASRock Radeon RX 570 Phantom Gaming U 8G OC video card vs ASUS ROG Strix Radeon RX 570 OC 4G video card by specs and benchmarks. ASRock Radeon RX 570 Phantom Gaming U 8G OC runs at 1.168 GHz base clock speed and has 8 GB of GDDR5 memory, while video card ASUS ROG Strix Radeon RX 570 OC 4G runs at 1.168 GHz base clock speed and has 4 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.