Comparison of PowerColor Hellhound Radeon RX 6600 XT video card vs ZOTAC GeForce GTX 1080 AMP Extreme 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 ZOTAC GeForce GTX 1080 AMP Extreme runs at 1.771 GHz+ 10 % base clock speed and has 8 GB of GDDR5X memory. The TDP of the first video card is 160 W, and the second is 270 W+ 50 %. Compare the table of benchmark results to find out which graphic card is better.