Power supply upgrade for T3600 WS from 425 W to 635 W

I have an 11 year-old T3600 WS.  When I recently upgraded my memory from 8 GB to 16 GB ECC, I got an error message that my power supply (425 W, Dell model # AC425EF-00) was insufficient to support my computer configuration.  So I need to upgrade the PS to 635 W, the maximum allowable according to the computer's spec sheet.  Searching online, I've noticed that there are several 635 W Dell PS with different model numbers (e.g., F635EF-00 and D635EF-00).  I also noticed that the pin configurations on my 425 W PS and all of the 635W PS's I saw were different.  My 425 PS has 3 groups of pins of 4, 4 and 11, reading left to right.  The 635 W PS's also have 3 groups of pins, but the number of pins in the middle group is 10, not 4 .  Does the difference in the number of pins in the middle group matter, and will any model of the Dell 635 W PS's work in my T3600?  Thanks.