Comparison of ZOTAC GeForce GTX 980 Ti AMP! Extreme video card vs Gainward GeForce RTX 2080 SUPER Phoenix video card by specs and benchmarks. ZOTAC GeForce GTX 980 Ti AMP! Extreme runs at 1.253 GHz+ 25 % base clock speed and has 6 GB of GDDR5 memory, while video card Gainward GeForce RTX 2080 SUPER Phoenix runs at 1.253 GHz+ 25 % base clock speed and has 8 GB of GDDR6 memory. The weight is different, -- vs --. The TDP of the first video card is 250 W, and the second is 250 W . Compare the benchmark results to find out which video card is better.