Comparison of Sapphire Pulse Radeon RX Vega 56 video card vs Sapphire Toxic Radeon RX 6900 XT Air Cooled video card by specifications and benchmarks. Sapphire Pulse Radeon RX Vega 56 runs at 1.208 GHz+ 4 % base clock speed and has 8 GB of HBM2 memory, while video card Sapphire Toxic Radeon RX 6900 XT Air Cooled runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory. The TDP of the first video card is 280 W+ 33 %, and the second is 400 W+ 33 %. Compare the table of benchmark results to find out which graphic card is better.