Comparison of MSI Radeon RX 5700 XT Mech OC video card vs ZOTAC GAMING GeForce GTX 1660 Twin Fan video card by specifications and benchmarks. MSI Radeon RX 5700 XT Mech OC runs at 1.670 GHz+ 4 % base clock speed and has 8 GB of GDDR6 memory, while video card ZOTAC GAMING GeForce GTX 1660 Twin Fan runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 memory. The TDP of the first video card is 225 W, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.