Comparison of XFX Radeon RX 580 GTR-S XXX Edition 8GB Crimson video card vs ZOTAC GAMING GeForce GTX 1660 Ti AMP 6GB GDDR6 video card by specifications and benchmarks. XFX Radeon RX 580 GTR-S XXX Edition 8GB Crimson runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory, while video card ZOTAC GAMING GeForce GTX 1660 Ti AMP 6GB GDDR6 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 130 W+ 8 %. Compare the table of benchmark results to find out which graphic card is better.