Comparison of PowerColor Radeon RX Vega 56 video card vs GIGABYTE AORUS Radeon RX 6900 XT Master 16G (rev. 2.0) video card by specifications and benchmarks. PowerColor Radeon RX Vega 56 runs at 1.156 GHz base clock speed and has 8 GB of HBM2 memory, while video card GIGABYTE AORUS Radeon RX 6900 XT Master 16G (rev. 2.0) runs at 1.950 GHz+ 7 % base clock speed and has 16 GB of GDDR6 memory. The TDP of the first video card is 210 W, and the second is 300 W. Compare the table of benchmark results to find out which graphic card is better.