Comparison of PowerColor Hellhound Radeon RX 6600 XT video card vs EVGA GeForce RTX 2060 SC ULTRA BLACK video card by specs and benchmarks. PowerColor Hellhound Radeon RX 6600 XT runs at 1.968 GHz base clock speed and has 8 GB of GDDR6 memory, while video card EVGA GeForce RTX 2060 SC ULTRA BLACK runs at 1.968 GHz base clock speed and has 6 GB of GDDR6 memory. The weight is different, -- vs --. The TDP of the first video card is 160 W, and the second is 160 W . Compare the benchmark results to find out which video card is better.