Comparison of XFX Radeon RX 580 GTR-S Black Edition 8GB White video card vs GIGABYTE GeForce GTX 1660 TI MINI ITX OC 6G video card by specifications and benchmarks. XFX Radeon RX 580 GTR-S Black Edition 8GB White runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory, while video card GIGABYTE GeForce GTX 1660 TI MINI ITX OC 6G runs at 1.500 GHz base clock speed and has 6 GB of GDDR6 memory. The TDP of the first video card is 185 W, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.