Comparison of ASRock Radeon RX 6600 XT Challenger ITX 8GB video card vs KFA2 GeForce GTX 1070 EX Red Edition video card by specifications and benchmarks. ASRock Radeon RX 6600 XT Challenger ITX 8GB runs at 1.968 GHz base clock speed and has 8 GB of GDDR6 memory, while video card KFA2 GeForce GTX 1070 EX Red Edition runs at 1.518 GHz+ 1 % base clock speed and has 8 GB of GDDR5 memory. The TDP of the first video card is 160 W, and the second is 150 W. Compare the table of benchmark results to find out which graphic card is better.