Comparison of ZOTAC GAMING GeForce GTX 1660 6GB GDDR5 video card vs GIGABYTE GeForce RTX 2080 Gaming 8G video card by specifications and benchmarks. ZOTAC GAMING GeForce GTX 1660 6GB GDDR5 runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 memory, while video card GIGABYTE GeForce RTX 2080 Gaming 8G runs at 1.515 GHz base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 120 W, and the second is 215 W. Compare the table of benchmark results to find out which graphic card is better.