Comparison of ASRock Radeon RX 6800 Challenger Pro 16G OC video card vs ASRock Radeon RX 6750 XT Phantom Gaming D 12GB OC video card by specs and benchmarks. ASRock Radeon RX 6800 Challenger Pro 16G OC runs at 1.750 GHz+ 3 % base clock speed and has 16 GB of GDDR6 memory, while video card ASRock Radeon RX 6750 XT Phantom Gaming D 12GB OC runs at 1.750 GHz+ 3 % base clock speed and has 12 GB of GDDR6 memory. The weight is different, 1250 g vs 1187 g. The TDP of the first video card is 250 W, and the second is 250 W . Compare the benchmark results to find out which video card is better.