Comparison of Gainward GeForce GTX 1080 Ti Phoenix video card vs ASUS ROG Matrix GeForce GTX 980 Ti video card by specifications and benchmarks. Gainward GeForce GTX 1080 Ti Phoenix runs at 1.480 GHz base clock speed and has 11 GB of GDDR5X memory, while video card ASUS ROG Matrix GeForce GTX 980 Ti runs at 1.000 GHz base clock speed and has 6 GB of GDDR5 memory. The TDP of the first video card is 250 W, and the second is 250 W. Compare the table of benchmark results to find out which graphic card is better.