Comparison of GIGABYTE Radeon RX 580 Gaming 8G MI video card vs ZOTAC GeForce GTX 1070 Twin Fan video card by specifications and benchmarks. GIGABYTE Radeon RX 580 Gaming 8G MI runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory, while video card ZOTAC GeForce GTX 1070 Twin Fan runs at 1.506 GHz base clock speed and has 8 GB of GDDR5 memory. The TDP of the first video card is 185 W, and the second is 220 W+ 47 %. Compare the table of benchmark results to find out which graphic card is better.