Comparison of Gainward GeForce GTX 1080 Ti Phoenix GS video card vs MSI Radeon RX 6800 Gaming Z Trio 16G video card by specs and benchmarks. Gainward GeForce GTX 1080 Ti Phoenix GS runs at 1.556 GHz+ 5 % base clock speed and has 11 GB of GDDR5X memory, while video card MSI Radeon RX 6800 Gaming Z Trio 16G runs at 1.556 GHz+ 5 % base clock speed and has 16 GB of GDDR6 memory. The weight is different, -- vs 1521 g. 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.