Comparison of Sapphire Pulse Radeon RX 5500 XT SF 4G video card vs Sapphire Nitro+ Radeon RX 6900 XT video card by specifications and benchmarks. Sapphire Pulse Radeon RX 5500 XT SF 4G runs at 1.607 GHz base clock speed and has 4 GB of GDDR6 memory, while video card Sapphire Nitro+ Radeon RX 6900 XT runs at 1.825 GHz base clock speed and has 16 GB of GDDR6 memory. The TDP of the first video card is 135 W+ 4 %, and the second is 340 W+ 13 %. Compare the table of benchmark results to find out which graphic card is better.