Comparison of ASRock Radeon RX 6800 Challenger Pro 16G OC video card vs SAPPHIRE Pulse Radeon RX 6750 XT 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 SAPPHIRE Pulse Radeon RX 6750 XT runs at 1.750 GHz+ 3 % base clock speed and has 12 GB of GDDR6 memory. The weight is different, 1250 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.