Comparison of PowerColor Hellhound Radeon RX 6600 video card vs MSI GeForce GTX 1660 TI AERO ITX 6G video card by specifications and benchmarks. PowerColor Hellhound Radeon RX 6600 runs at 1.626 GHz base clock speed and has 8 GB of GDDR6 memory, while video card MSI GeForce GTX 1660 TI AERO ITX 6G runs at 1.500 GHz base clock speed and has 6 GB of GDDR6 memory. The TDP of the first video card is 132 W, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.