Comparison of SAPPHIRE PULSE RX 550 4G G5 640SP video card vs SAPPHIRE PULSE RX 550 4G G5 640SP video card by specifications and benchmarks. SAPPHIRE PULSE RX 550 4G G5 640SP runs at 1.019 GHz base clock speed and has 4 GB of GDDR5 memory, while video card SAPPHIRE PULSE RX 550 4G G5 640SP runs at 1.019 GHz base clock speed and has 4 GB of GDDR5 memory. The TDP of the first video card is 65 W+ 8 %, and the second is 65 W+ 8 %. Compare the table of benchmark results to find out which graphic card is better.