Thanks for your recommendation. Eventually I selected WD SN570, the power consumption is 6W (3.3V*1.8A) which is close to the original 5W. There is no problem after few days running.
The SSD of my XPS is diagnosed as damage. I have to change a new one. The old PM951 SSD is 3.3V and 1.5A marking on the label. The new 970 EVO is 3.3V and 2.7A and other bands also have higher current 2.5A something. My question is does the current difference cause compatibility issue once 2.7A replaces 1.5A? [IMAGE] [IMAGE]    
XPS 13 9360 SSD power question