Comparison of XFX Radeon RX 6800 XT video card vs PowerColor Fighter Radeon RX 6500 XT 4GB video card by specifications and benchmarks. XFX Radeon RX 6800 XT runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory, while video card PowerColor Fighter Radeon RX 6500 XT 4GB runs at 2.200 GHz base clock speed and has 4 GB of GDDR6 memory. The TDP of the first video card is 300 W, and the second is 107 W. Compare the table of benchmark results to find out which graphic card is better.