Comparison of Sapphire Radeon RX Vega 56 video card vs GALAX GeForce RTX 2080 Ti HOF video card by specifications and benchmarks. Sapphire Radeon RX Vega 56 runs at 1.156 GHz base clock speed and has 8 GB of HBM2 memory, while video card GALAX GeForce RTX 2080 Ti HOF 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.