Comparison of ASRock Radeon RX 6750 XT Challenger Pro 12GB OC video card vs AMD Radeon RX 7800 XT video card by specs and benchmarks. ASRock Radeon RX 6750 XT Challenger Pro 12GB OC runs at 2.235 GHz+ 2 % base clock speed and has 12 GB of GDDR6 memory, while video card AMD Radeon RX 7800 XT runs at 2.235 GHz+ 2 % base clock speed and has 16 GB of GDDR6 memory. The weight is different, 890 g vs --. 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.