Comparison of XFX Radeon RX 5700 XT Double Dissipation video card vs EVGA GeForce GTX 1660 Ti XC BLACK GAMING video card by specifications and benchmarks. XFX Radeon RX 5700 XT Double Dissipation runs at 1.605 GHz base clock speed and has 8 GB of GDDR6 memory, while video card EVGA GeForce GTX 1660 Ti XC BLACK GAMING runs at 1.500 GHz base clock speed and has 6 GB of GDDR6 memory. The TDP of the first video card is 225 W, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.