Comparison of Sapphire Nitro+ Radeon RX 6900 XT video card vs GALAX GeForce GTX 1660 Ti EX (1-Click OC) video card by specifications and benchmarks. Sapphire Nitro+ Radeon RX 6900 XT runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory, while video card GALAX GeForce GTX 1660 Ti EX (1-Click OC) runs at 1.500 GHz base clock speed and has 6 GB of GDDR6 memory. The TDP of the first video card is 340 W+ 13 %, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.