Comparison of Sapphire Toxic Radeon RX 6900 XT Limited Edition video card vs EVGA GeForce GTX 1660 Ti XC ULTRA GAMING video card by specifications and benchmarks. Sapphire Toxic Radeon RX 6900 XT Limited Edition runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory, while video card EVGA GeForce GTX 1660 Ti XC ULTRA GAMING runs at 1.500 GHz base clock speed and has 6 GB of GDDR6 memory. The TDP of the first video card is 400 W+ 33 %, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.