Comparison of Sapphire Radeon RX 6900 XT video card vs EVGA GeForce GTX 1070 Ti SC GAMING video card by specifications and benchmarks. Sapphire Radeon RX 6900 XT runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory, while video card EVGA GeForce GTX 1070 Ti SC GAMING runs at 1.607 GHz base clock speed and has 8 GB of GDDR5 memory. The TDP of the first video card is 300 W, and the second is 180 W. Compare the table of benchmark results to find out which graphic card is better.