Comparison of PowerColor Hellhound Radeon RX 6600 XT video card vs Manli GeForce RTX 3080 Gallardo (M3478) video card by specifications 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 Manli GeForce RTX 3080 Gallardo (M3478) runs at 1.440 GHz base clock speed and has 10 GB of GDDR6X memory. The TDP of the first video card is 160 W, and the second is 320 W. Compare the table of benchmark results to find out which graphic card is better.