Comparison of Sapphire Radeon RX Vega 56 video card vs NVIDIA GeForce RTX 3090 Founders Edition video card by specifications and benchmarks. Sapphire Radeon RX Vega 56 runs at 1.156 GHz base clock speed and has 8 GB of HBM2 memory, while video card NVIDIA GeForce RTX 3090 Founders Edition runs at 1.395 GHz base clock speed and has 24 GB of GDDR6X memory. The TDP of the first video card is 210 W, and the second is 350 W. Compare the table of benchmark results to find out which graphic card is better.