Comparison of XFX Speedster MERC 319 Radeon RX 6700 XT Black Gaming video card vs Colorful GeForce GTX 1660 6G-V video card by specifications and benchmarks. XFX Speedster MERC 319 Radeon RX 6700 XT Black Gaming runs at 2.457 GHz+ 6 % base clock speed and has 12 GB of GDDR6 memory, while video card Colorful GeForce GTX 1660 6G-V runs at 1.530 GHz base clock speed and has 6 GB of GDDR5 memory. The TDP of the first video card is 211 W-8 %, and the second is 120 W. Compare the table of benchmark results to find out which graphic card is better.