You can use this Link to check which RAM is suitable for your Mac...
It is Important to get the Correct and Matching RAM
For best performance, fill all memory slots, installing an equal memory module in each slot.
That site also has videos on how to Install RAM should you need it...
You have a Late 2011 MacBook Pro. Officially, your Mac supports only 8 GB of memory, but you can use 16 GB of memory without any problem on that Mac.
The memory that your Mac needs is PC3-10600 1333 MHz RAM (1600 MHz RAM is for the Mid 2012 MacBook Pro). You can buy the memory in OWC or Crucial (Crucial is cheaper and gives you the same compatibility warranty as OWC).
If you need help installing the memory > http://support.apple.com/kb/HT1270
I'm with mende1 on recommending Crucial (even though I presently have the Corsair that Courcoul mentions).
Go to the Crucial website and use the System Scanner tab to find the right RAM for your computer. You can directly order from Crucial, or maybe save a few buck and order from Amazon. Although OWC makes good memory, I feel that it is overpriced.
So where would Kingston fit into all this?
From what i can see
OWC is the best/ most recommended for mac
CRucial is great
Corsair good but take it or leave it?
Is there much of a difference in quality between these guys as i would need to get OWC from the U.S and postage isn't cheap.
I used to use Kingston - no longer, though, after some bad experiences. A number of folks use OWC, probably more use Crucial, and a few of us use Corsair. OWC, Crucial & Corsair are the big winners here (except for the Corsair 'value' RAM - I would stay away from it).
You don't say where you're located, but Crucial does have a UK website, as well - http://www.crucial.com/uk/ - if that would lower your shipping charges...
Currently Being ModeratedFeb 10, 2013 4:37 AM (in response to clintonfrombirmingham)
I am in Australia sorry forgot to add that one.
The crucial i can get with free shipping so no problems there, i just know how picky mac's can be with adding on extra hardware.
In Australia it seems like a very new thing to modify Mac's as they were never really popular until recent so a bit lost here if we were talking windows id be all set lol.
Any idea if this
Corsair 16GB CMSA16GX3M2A1333C9
is a value model as I couldn't find anything.
Seems like maybe I should stick with Crucial
Yep, that's the same as I have - http://www.amazon.com/Corsair-Certified-Laptop-Memory-CMSA16GX3M2A1333C9/dp/B006 ON5KZC - from Amazon, US. That would work perfectly well. And I can personally recommend that as that's what I've had in my MBP since April of last year - it is NOT the value brand - same thing that Courcoul has as well.
It's a toss-up - I'd order either the COrsair or the Crucial - whichever you can get the cheapest with the lowest shipping costs... you'll be golden!
Just look at how much RAM my MBP is eating up now...
It's only been two days since a restart and I do have 6GB allocated to Windows 7 Pro running under Parallels but whoever says that you'll never use 16GB of RAM in a MBP is just crazy.