Comparison of PowerColor Liquid Devil Radeon RX 6900 XT Ultimate video card vs GIGABYTE AORUS GeForce RTX 3090 XTREME WATERFORCE 24G 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 GIGABYTE AORUS GeForce RTX 3090 XTREME WATERFORCE 24G 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 400 W+ 14 %. Compare the table of benchmark results to find out which graphic card is better.