Comparison of GIGABYTE GeForce RTX 2080 Gaming OC 8G video card vs Gainward GeForce RTX 3080 Phantom GS video card by specifications and benchmarks. GIGABYTE GeForce RTX 2080 Gaming OC 8G runs at 1.515 GHz base clock speed and has 8 GB of GDDR6 memory, while video card Gainward GeForce RTX 3080 Phantom GS runs at 1.440 GHz base clock speed and has 10 GB of GDDR6X memory. The TDP of the first video card is 225 W+ 5 %, and the second is 370 W+ 16 %. Compare the table of benchmark results to find out which graphic card is better.