Comparison of PowerColor Liquid Devil Radeon RX 6900 XT Ultimate video card vs Colorful iGame GeForce RTX 3090 Vulcan OC-V video card by specifications and benchmarks. PowerColor Liquid Devil Radeon RX 6900 XT Ultimate runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory, while video card Colorful iGame GeForce RTX 3090 Vulcan OC-V runs at 1.395 GHz base clock speed and has 24 GB of GDDR6X memory. The TDP of the first video card is 300 W, and the second is 390 W+ 11 %. Compare the table of benchmark results to find out which graphic card is better.