Comparison of PowerColor Hellhound Radeon RX 6600 XT video card vs MSI GeForce GTX 1660 SUPER AERO ITX video card by specifications and benchmarks. PowerColor Hellhound Radeon RX 6600 XT runs at 1.968 GHz base clock speed and has 8 GB of GDDR6 memory, while video card MSI GeForce GTX 1660 SUPER AERO ITX runs at 1.530 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 125 W. Compare the table of benchmark results to find out which graphic card is better.