Comparison of Sapphire Radeon RX 5700 8G video card vs Gainward GeForce RTX 3070 Phantom GS V1 LHR video card by specifications and benchmarks. Sapphire Radeon RX 5700 8G runs at 1.465 GHz base clock speed and has 8 GB of GDDR6 memory, while video card Gainward GeForce RTX 3070 Phantom GS V1 LHR runs at 1.500 GHz base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 180 W, and the second is 270 W+ 23 %. Compare the table of benchmark results to find out which graphic card is better.