Comparison of PowerColor Hellhound Radeon RX 6600 video card vs PowerColor Radeon RX 6500 XT ITX 4GB video card by specifications and benchmarks. PowerColor Hellhound Radeon RX 6600 runs at 1.626 GHz base clock speed and has 8 GB of GDDR6 memory, while video card PowerColor Radeon RX 6500 XT ITX 4GB runs at 2.200 GHz base clock speed and has 4 GB of GDDR6 memory. The TDP of the first video card is 132 W, and the second is 107 W. Compare the table of benchmark results to find out which graphic card is better.