Comparison of ASRock Radeon RX 6600 XT Challenger ITX 8GB video card vs ASUS Dual Radeon RX 6500 XT OC Edition video card by specifications and benchmarks. ASRock Radeon RX 6600 XT Challenger ITX 8GB runs at 1.968 GHz base clock speed and has 8 GB of GDDR6 memory, while video card ASUS Dual Radeon RX 6500 XT OC Edition 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 107 W. Compare the table of benchmark results to find out which graphic card is better.