Comparison of Sapphire Radeon RX 6800 XT video card vs Colorful GeForce GTX 1660 NB 6G-V video card by specifications and benchmarks. Sapphire Radeon RX 6800 XT runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory, while video card Colorful GeForce GTX 1660 NB 6G-V runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 memory. The TDP of the first video card is 300 W, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.