Comparison of ASRock Intel Arc A750 Challenger D 8GB OC video card vs Intel Arc A770 Graphics 16GB video card by specifications and benchmarks. ASRock Intel Arc A750 Challenger D 8GB OC runs at 2.200 GHz+ 7 % base clock speed and has 8 GB of GDDR6 memory, while video card Intel Arc A770 Graphics 16GB runs at 2.100 GHz base clock speed and has 16 GB of GDDR6 memory. The TDP of the first video card is 225 W, and the second is 225 W. Compare the table of benchmark results to find out which graphic card is better.