Comparison of ASRock Radeon RX 6400 Challenger ITX 4GB video card vs ASUS Dual Radeon RX 6400 video card by specs and benchmarks. ASRock Radeon RX 6400 Challenger ITX 4GB runs at 1.923 GHz base clock speed and has 4 GB of GDDR6 memory, while video card ASUS Dual Radeon RX 6400 runs at 1.923 GHz base clock speed and has 4 GB of GDDR6 memory. The weight is different, 275 g vs --. The TDP of the first video card is 53 W, and the second is 53 W . Compare the benchmark results to find out which video card is better.