Comparison of AMD Radeon RX 6400 - Reference Data video card vs PowerColor Radeon RX 6400 ITX 4GB video card by specs and benchmarks. AMD Radeon RX 6400 - Reference Data runs at base clock speed and has 4 GB of GDDR6 memory, while video card PowerColor Radeon RX 6400 ITX 4GB runs at base clock speed and has 4 GB of GDDR6 memory. The weight is different, -- 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.