Comparison of Sapphire Pulse Radeon RX 5500 XT SF 8G video card vs ASRock Radeon RX 6600 XT Phantom Gaming D 8GB OC video card by specifications and benchmarks. Sapphire Pulse Radeon RX 5500 XT SF 8G runs at 1.607 GHz base clock speed and has 8 GB of GDDR6 memory, while video card ASRock Radeon RX 6600 XT Phantom Gaming D 8GB OC runs at 2.064 GHz+ 5 % 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 160 W. Compare the table of benchmark results to find out which graphic card is better.