Comparison of PowerColor Radeon RX Vega 56 Nano Edition video card vs Colorful iGame GeForce RTX 2080 Neptune OC-V video card by specifications and benchmarks. PowerColor Radeon RX Vega 56 Nano Edition runs at 1.156 GHz base clock speed and has 8 GB of HBM2 memory, while video card Colorful iGame GeForce RTX 2080 Neptune OC-V runs at 1.515 GHz base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 210 W, and the second is 215 W. Compare the table of benchmark results to find out which graphic card is better.