Comparison of GIGABYTE Radeon RX Vega 64 Silver 8G video card vs EVGA GeForce GTX 1660 Ti XC OC video card by specifications and benchmarks. GIGABYTE Radeon RX Vega 64 Silver 8G runs at 1.247 GHz base clock speed and has 8 GB of HBM2 memory, while video card EVGA GeForce GTX 1660 Ti XC OC runs at 1.500 GHz base clock speed and has 6 GB of GDDR6 memory. The TDP of the first video card is 295 W, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.