Comparison of XFX Speedster MERC 319 Radeon RX 6700 XT Black Gaming video card vs KFA2 GeForce GTX 1660 White Mini (1-Click OC) 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 KFA2 GeForce GTX 1660 White Mini (1-Click OC) 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.