Comparison of Sapphire Radeon RX Vega 56 video card vs GALAX GeForce GTX 1660 Ti EX (1-Click OC) video card by specifications and benchmarks. Sapphire Radeon RX Vega 56 runs at 1.156 GHz base clock speed and has 8 GB of HBM2 memory, while video card GALAX GeForce GTX 1660 Ti EX (1-Click OC) runs at 1.500 GHz base clock speed and has 6 GB of GDDR6 memory. The TDP of the first video card is 210 W, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.