Comparison of XFX Radeon RX 580 GTS Black Core Edition 8GB video card vs ASRock Phantom Gaming X Radeon VII 16G video card by specifications and benchmarks. XFX Radeon RX 580 GTS Black Core Edition 8GB runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory, while video card ASRock Phantom Gaming X Radeon VII 16G runs at 1.400 GHz base clock speed and has 16 GB of HBM2 memory. The TDP of the first video card is 185 W, and the second is 300 W. Compare the table of benchmark results to find out which graphic card is better.