Comparison of Sapphire Pulse Radeon RX Vega 56 video card vs ZOTAC GeForce GTX 1080 Ti Blower video card by specifications and benchmarks. Sapphire Pulse Radeon RX Vega 56 runs at 1.208 GHz+ 4 % base clock speed and has 8 GB of HBM2 memory, while video card ZOTAC GeForce GTX 1080 Ti Blower runs at 1.480 GHz base clock speed and has 11 GB of GDDR5X memory. The TDP of the first video card is 280 W+ 33 %, and the second is 250 W. Compare the table of benchmark results to find out which graphic card is better.