Comparison of GIGABYTE Radeon RX 6900 XT 16G video card vs Gainward GeForce RTX 3080 Phantom GS V1 LHR video card by specifications and benchmarks. GIGABYTE Radeon RX 6900 XT 16G runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory, while video card Gainward GeForce RTX 3080 Phantom GS V1 LHR runs at 1.440 GHz base clock speed and has 10 GB of GDDR6X memory. The TDP of the first video card is 300 W, and the second is 370 W+ 16 %. Compare the table of benchmark results to find out which graphic card is better.