Comparison of PowerColor Red Devil Radeon RX 6800 XT video card vs ZOTAC GeForce GTX 1080 Ti AMP Extreme Core Edition video card by specifications and benchmarks. PowerColor Red Devil Radeon RX 6800 XT runs at 1.900 GHz+ 4 % base clock speed and has 16 GB of GDDR6 memory, while video card ZOTAC GeForce GTX 1080 Ti AMP Extreme Core Edition runs at 1.607 GHz+ 9 % base clock speed and has 11 GB of GDDR5X memory. The TDP of the first video card is 300 W, and the second is 320 W+ 28 %. Compare the table of benchmark results to find out which graphic card is better.