Comparison of Sapphire Pulse Radeon RX Vega 56 video card vs ZOTAC GAMING GeForce GTX 1660 SUPER Twin Fan 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 GAMING GeForce GTX 1660 SUPER Twin Fan runs at 1.530 GHz base clock speed and has 6 GB of GDDR6 memory. The TDP of the first video card is 280 W+ 33 %, and the second is 125 W. Compare the table of benchmark results to find out which graphic card is better.