Comparison of GIGABYTE Radeon RX 6900 XT Gaming OC 16G video card vs MANLI GeForce GTX 1660 Gallardo (M2436+N549-00) video card by specifications and benchmarks. GIGABYTE Radeon RX 6900 XT Gaming OC 16G runs at 1.875 GHz+ 3 % base clock speed and has 16 GB of GDDR6 memory, while video card MANLI GeForce GTX 1660 Gallardo (M2436+N549-00) runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 memory. The TDP of the first video card is 340 W+ 13 %, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.