Comparison of ASRock Phantom Gaming X Radeon VII 16G video card vs PowerColor Radeon RX Vega 56 Nano Edition video card by specifications and benchmarks. ASRock Phantom Gaming X Radeon VII 16G runs at 1.400 GHz base clock speed and has 16 GB of HBM2 memory, while video card PowerColor Radeon RX Vega 56 Nano Edition runs at 1.156 GHz base clock speed and has 8 GB of HBM2 memory. The TDP of the first video card is 300 W, and the second is 210 W. Compare the table of benchmark results to find out which graphic card is better.