Comparison of ZOTAC GAMING GeForce RTX 2080 Ti Twin Fan video card vs NVIDIA GeForce GTX 1080 Ti video card by specs and benchmarks. ZOTAC GAMING GeForce RTX 2080 Ti Twin Fan runs at 1.350 GHz base clock speed and has 11 GB of GDDR6 memory, while video card NVIDIA GeForce GTX 1080 Ti runs at 1.350 GHz base clock speed and has 11 GB of GDDR5X 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.