Comparison of ASRock Radeon RX 6600 XT Challenger D 8GB OC video card vs SAPPHIRE PULSE AMD Radeon RX 6500 XT video card by specifications and benchmarks. ASRock Radeon RX 6600 XT Challenger D 8GB OC runs at 2.000 GHz+ 2 % base clock speed and has 8 GB of GDDR6 memory, while video card SAPPHIRE PULSE AMD Radeon RX 6500 XT runs at 2.200 GHz base clock speed and has 4 GB of GDDR6 memory. The TDP of the first video card is 160 W, and the second is 130 W+ 21 %. Compare the table of benchmark results to find out which graphic card is better.