Comparison of Sapphire Radeon RX Vega 56 video card vs Zotac GAMING GeForce RTX 3080 AMP Extreme Holo LHR 12GB video card by specifications and benchmarks. Sapphire Radeon RX Vega 56 runs at 1.156 GHz base clock speed and has 8 GB of HBM2 memory, while video card Zotac GAMING GeForce RTX 3080 AMP Extreme Holo LHR 12GB runs at 1.260 GHz base clock speed and has 12 GB of GDDR6X memory. The TDP of the first video card is 210 W, and the second is 390 W+ 11 %. Compare the table of benchmark results to find out which graphic card is better.