Comparison of ZOTAC GeForce GTX 980 Ti AMP! video card vs Colorful iGame GeForce GTX 1080 Ti Vulcan X OC-V video card by specs and benchmarks. ZOTAC GeForce GTX 980 Ti AMP! runs at 1.051 GHz+ 5 % base clock speed and has 6 GB of GDDR5 memory, while video card Colorful iGame GeForce GTX 1080 Ti Vulcan X OC-V runs at 1.051 GHz+ 5 % 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.