Comparison of ASUS Radeon RX Vega 64 Silver video card vs Gainward GeForce GTX 1660 Ghost OC video card by specifications and benchmarks. ASUS Radeon RX Vega 64 Silver runs at 1.247 GHz base clock speed and has 8 GB of HBM2 memory, while video card Gainward GeForce GTX 1660 Ghost OC runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 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.