Comparison of ASUS Radeon RX Vega 56 video card vs Gainward GeForce RTX 3080 Ti Phantom video card by specifications and benchmarks. ASUS Radeon RX Vega 56 runs at 1.156 GHz base clock speed and has 8 GB of HBM2 memory, while video card Gainward GeForce RTX 3080 Ti Phantom runs at 1.365 GHz base clock speed and has 12 GB of GDDR6X memory. The TDP of the first video card is 210 W, and the second is 350 W. Compare the table of benchmark results to find out which graphic card is better.