Comparison of ASRock Radeon RX 580 Phantom Gaming U 8G OC video card vs MSI Radeon RX 580 Gaming X+ 8G video card by specifications and benchmarks. ASRock Radeon RX 580 Phantom Gaming U 8G OC runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory, while video card MSI Radeon RX 580 Gaming X+ 8G runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory. The TDP of the first video card is 185 W, and the second is 185 W. Compare the table of benchmark results to find out which graphic card is better.