Comparison of ASRock Radeon RX 570 Phantom Gaming U 8G OC video card vs MSI Radeon RX 570 Armor 4G OC 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 MSI Radeon RX 570 Armor 4G OC runs at 1.168 GHz base clock speed and has 4 GB of GDDR5 memory. The weight is different, -- vs 622 g. 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.