Comparison of Sapphire Radeon RX Vega 56 video card vs GALAX GeForce RTX 2080 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 runs at 1.515 GHz base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 210 W, and the second is 215 W. Compare the table of benchmark results to find out which graphic card is better.