Comparison of Gainward GeForce RTX 4090 Phantom video card vs KFA2 GeForce RTX 4090 SG White (1-Click OC) video card by specs 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 KFA2 GeForce RTX 4090 SG White (1-Click OC) runs at 2.235 GHz base clock speed and has 24 GB of GDDR6X memory. The weight is different, -- vs --. The TDP of the first video card is 450 W, and the second is 450 W . Compare the benchmark results to find out which video card is better.