Comparison of Sapphire Radeon VII video card vs ZOTAC GeForce GTX 1080 IceStorm 2X video card by specifications and benchmarks. Sapphire Radeon VII runs at 1.400 GHz base clock speed and has 16 GB of HBM2 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 300 W, and the second is 230 W+ 28 %. Compare the table of benchmark results to find out which graphic card is better.