Comparison of PowerColor Hellhound Radeon RX 6600 video card vs ZOTAC GeForce GTX 1080 IceStorm 2X 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 ZOTAC GeForce GTX 1080 IceStorm 2X runs at 1.607 GHz base clock speed and has 8 GB of GDDR5X memory. The TDP of the first video card is 132 W, and the second is 230 W+ 28 %. Compare the table of benchmark results to find out which graphic card is better.