Comparison of ASRock Radeon RX 6600 XT Challenger D 8GB OC video card vs ZOTAC GeForce GTX 1070 Twin Fan video card by specifications and benchmarks. ASRock Radeon RX 6600 XT Challenger D 8GB OC runs at 2.000 GHz+ 2 % base clock speed and has 8 GB of GDDR6 memory, while video card ZOTAC GeForce GTX 1070 Twin Fan runs at 1.506 GHz base clock speed and has 8 GB of GDDR5 memory. The TDP of the first video card is 160 W, and the second is 220 W+ 47 %. Compare the table of benchmark results to find out which graphic card is better.