Comparison of Sapphire Pulse Radeon RX 5500 XT 4G video card vs Sapphire Pulse Radeon RX 6600 video card by specifications and benchmarks. Sapphire Pulse Radeon RX 5500 XT 4G runs at 1.607 GHz base clock speed and has 4 GB of GDDR6 memory, while video card Sapphire Pulse Radeon RX 6600 runs at 1.626 GHz base clock speed and has 8 GB of GDDR6 memory. The TDP of the first video card is 135 W+ 4 %, and the second is 132 W. Compare the table of benchmark results to find out which graphic card is better.