Comparison of ASRock Radeon RX 6700 XT Challenger D 12GB video card vs GIGABYTE Radeon RX 6900 XT Gaming OC 16G video card by specifications and benchmarks. ASRock Radeon RX 6700 XT Challenger D 12GB runs at 2.321 GHz base clock speed and has 12 GB of GDDR6 memory, while video card GIGABYTE Radeon RX 6900 XT Gaming OC 16G runs at 1.875 GHz+ 3 % base clock speed and has 16 GB of GDDR6 memory. The TDP of the first video card is 230 W, and the second is 340 W+ 13 %. Compare the table of benchmark results to find out which graphic card is better.