Comparison of Sapphire Pulse Radeon RX 5500 XT 8G video card vs XFX Radeon RX 6800 video card by specifications and benchmarks. Sapphire Pulse Radeon RX 5500 XT 8G runs at 1.607 GHz base clock speed and has 8 GB of GDDR6 memory, while video card XFX Radeon RX 6800 runs at 1.700 GHz base clock speed and has 16 GB of GDDR6 memory. The TDP of the first video card is 135 W+ 4 %, and the second is 250 W. Compare the table of benchmark results to find out which graphic card is better.