Comparison of PowerColor Radeon RX 5700 Red Devil video card vs SAPPHIRE Radeon RX 6700 XT video card by specifications and benchmarks. PowerColor Radeon RX 5700 Red Devil runs at 1.610 GHz+ 10 % base clock speed and has 8 GB of GDDR6 memory, while video card SAPPHIRE Radeon RX 6700 XT runs at 2.321 GHz base clock speed and has 12 GB of GDDR6 memory. The TDP of the first video card is 180 W, and the second is 230 W. Compare the table of benchmark results to find out which graphic card is better.