Comparison of SAPPHIRE PULSE Radeon RX 6600 XT video card vs Colorful GeForce GTX 1660 Ti 6G-V video card by specifications and benchmarks. SAPPHIRE PULSE Radeon RX 6600 XT runs at 1.968 GHz base clock speed and has 8 GB of GDDR6 memory, while video card Colorful GeForce GTX 1660 Ti 6G-V runs at 1.500 GHz base clock speed and has 6 GB of GDDR6 memory. The TDP of the first video card is 160 W, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.