Comparison of Gainward GeForce RTX 4090 Phantom video card vs ZOTAC GAMING GeForce RTX 4090 AMP Extreme AIRO video card by specifications and benchmarks. Gainward GeForce RTX 4090 Phantom runs at 2.235 GHz base clock speed and has 24 GB of GDDR6X memory, while video card ZOTAC GAMING GeForce RTX 4090 AMP Extreme AIRO runs at 2.235 GHz base clock speed and has 24 GB of GDDR6X memory. The TDP of the first video card is 450 W, and the second is 450 W. Compare the table of benchmark results to find out which graphic card is better.