Comparison of PowerColor Radeon RX 5700 XT Red Devil Limited Edition video card vs GALAX GeForce GTX 1660 Super video card by specifications and benchmarks. PowerColor Radeon RX 5700 XT Red Devil Limited Edition runs at 1.770 GHz+ 10 % base clock speed and has 8 GB of GDDR6 memory, while video card GALAX GeForce GTX 1660 Super runs at 1.530 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 125 W. Compare the table of benchmark results to find out which graphic card is better.