Comparison of Sapphire Radeon RX Vega 64 video card vs Gainward GeForce RTX 3080 Phantom+ GS LHR video card by specifications and benchmarks. Sapphire Radeon RX Vega 64 runs at 1.247 GHz base clock speed and has 8 GB of HBM2 memory, while video card Gainward GeForce RTX 3080 Phantom+ GS LHR runs at 1.440 GHz base clock speed and has 10 GB of GDDR6X memory. The TDP of the first video card is 295 W, and the second is 370 W+ 16 %. Compare the table of benchmark results to find out which graphic card is better.