What's the difference between DDR3 1333 MHz PC3-10600S and DDR3 1333 MHz PC3-10600

Oh, yes - Corsair's "Mac Memory" is very, very good. And that which you have selected has all of the right specifications!

Buy away!

Clinton

EDIT: That's the same memory that I purchased when I went from 4GB to 8GB, too.

Message was edited by: clintonfrombirmingham

Your Mac uses 204-pin PC-10600 (1333 MHz) DDR3 SO-DIMMs. I've no idea what the "s" means.

If you're buying Corsair RAM, just make sure that you don't get the "value" RAM - it (and a ton of other manufacturers) will not play nice with your MacBook Pro.

Good luck,

Clinton

That should work. I had 8GB of Corsair when I first got my MacBook Pro, before upgrading to 16GB of Crucial RAM, and never had a problem with it - just make certain that it's not a "value" package.

Could you copy and paste the url from either the seller's site or Corsair's site? I'd like to see the RAM personally before recommending it.

Call back,

Clinton

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.