Comparison of ASRock Phantom Gaming X Radeon RX Vega 56 video card vs ASUS Dual GeForce RTX 2080 Ti OC video card by specifications and benchmarks. ASRock Phantom Gaming X Radeon RX Vega 56 runs at 1.156 GHz base clock speed and has 8 GB of HBM2 memory, while video card ASUS Dual GeForce RTX 2080 Ti OC runs at 1.350 GHz base clock speed and has 11 GB of GDDR6 memory. The TDP of the first video card is 210 W, and the second is 250 W. Compare the table of benchmark results to find out which graphic card is better.