Comparison of Gainward GeForce RTX 3080 12GB Phantom video card vs GIGABYTE GeForce RTX 3090 VISION OC 24G video card by specifications and benchmarks. Gainward GeForce RTX 3080 12GB Phantom runs at 1.260 GHz base clock speed and has 12 GB of GDDR6X memory, while video card GIGABYTE GeForce RTX 3090 VISION OC 24G runs at 1.395 GHz base clock speed and has 24 GB of GDDR6X memory. The TDP of the first video card is 350 W, and the second is 350 W. Compare the table of benchmark results to find out which graphic card is better.