Comparison of PowerColor Hellhound Radeon RX 6700 XT video card vs Sapphire Pulse Radeon RX 6800 video card by specifications and benchmarks. PowerColor Hellhound Radeon RX 6700 XT runs at 2.321 GHz base clock speed and has 12 GB of GDDR6 memory, while video card Sapphire Pulse Radeon RX 6800 runs at 1.800 GHz+ 6 % base clock speed and has 16 GB of GDDR6 memory. The TDP of the first video card is 230 W, and the second is 250 W. Compare the table of benchmark results to find out which graphic card is better.