Comparison of Sapphire Radeon RX 6800 video card vs GALAX GeForce GTX 1080 Ti EX OC video card by specs and benchmarks. Sapphire Radeon RX 6800 runs at 1.800 GHz+ 6 % base clock speed and has 16 GB of GDDR6 memory, while video card GALAX GeForce GTX 1080 Ti EX OC runs at 1.800 GHz+ 6 % base clock speed and has 11 GB of GDDR5X memory. The weight is different, -- vs --. The TDP of the first video card is 250 W, and the second is 250 W . Compare the benchmark results to find out which video card is better.