Comparison of PowerColor Hellhound Radeon RX 6600 XT video card vs EVGA GeForce GTX 1080 GAMING 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 EVGA GeForce GTX 1080 GAMING runs at 1.607 GHz base clock speed and has 8 GB of GDDR5X memory. The TDP of the first video card is 160 W, and the second is 180 W. Compare the table of benchmark results to find out which graphic card is better.