Comparison of MSI Radeon RX 580 Armor MK2 8G OC video card vs ASUS TUF Gaming X3 GeForce GTX 1660 OC video card by specifications and benchmarks. MSI Radeon RX 580 Armor MK2 8G OC runs at 1.257 GHz base clock speed and has 8 GB of GDDR5 memory, while video card ASUS TUF Gaming X3 GeForce GTX 1660 OC runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 memory. The TDP of the first video card is 185 W, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.