Comparison of Sapphire Toxic Radeon RX 6900 XT Extreme Edition video card vs GALAX GeForce GTX 1080 Ti EX OC video card by specifications and benchmarks. Sapphire Toxic Radeon RX 6900 XT Extreme Edition runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory, while video card GALAX GeForce GTX 1080 Ti EX OC runs at 1.531 GHz+ 3 % base clock speed and has 11 GB of GDDR5X memory. The TDP of the first video card is 430 W+ 43 %, and the second is 250 W. Compare the table of benchmark results to find out which graphic card is better.