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I am trying to upgrade my RAM of my HP G62-b51SE and found that the stock RAM type is DDR3 PC3-10600S.

I am trying to find the difference between that (PC3-10600S) and PC3-10600.

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This is my stock ram and i cant find information on ram type pc3-10600S : tinypic.com/r/kx6qo/6 – user1907294 Dec 18 '12 at 3:26
    
maybe it is meant to mean plural. – barlop Dec 18 '12 at 5:25
    
Maybe the S refers to Stock. – deed02392 Jan 23 '14 at 11:21
    
Where did you see "pc3-10600s" exactly? – David Schwartz Jun 30 '14 at 6:43

S stands for SODIMM, meaning the RAM is for laptop.

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2  
+1 - For the actual correct answer..! However, if you could edit your link to provide some backup to your statement (a link and a summary of that link), that would be great. – Greenonline Apr 20 at 3:02

Following on from Grace's answer, this link What's the difference between DDR3 1333 MHz PC3-10600S and DDR3 1333 MHz PC3-10600 states:

To answer you actual question correctly. The "S" as in DDR3 10600S for example stands for SO-DIMM which is the size of RAM for Laptops. If you had desktop memory the same RAM would say DDR3 10600. Crucial and other companies have a way of not listing the RAM speed with the "S' because in the title of the RAM you are purchasing it says "SO-DIM' but when you get your RAM it will have the "S" on it if you are buying for a laptop.

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Google searches for 598859-001 and 598856-001 as shown as the replacement parts in your picture result in memory of type pc3-10600. I think its just a confusing label on your modules.

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Even if 10600S is the actual stock type, I'm guessing there is no practical difference. – Louis Dec 18 '12 at 5:56
    
PC3-10600S would usually indicate registered, synchronous memory. See, for example, here or here. – David Schwartz Jun 30 '14 at 6:45

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