2011 MBP ram upgrade question

[Shredder-]

So, Ive got a late 2011 MBP, with default 4 GB of RAM in much need of more ram - how do I know what ram to get? I need at least 8. Do I need to replace my current ram (as they are 2x2) or what?

how do i know what is the most suitable?

If it matters: i do music production and the software is eating alot of ram

 

[maflynn]

Put in your model at crucial.com and it will give you what you need.

[MOD NOTE]
I changed the title, as it was not really clear what you were looking for by your old title.

 

[mac8867]

You MBP can unofficially go up to 16GB. It has two memory slots, so replacement would be required whether you go to 8 (2x4GB) or 16 (2x8GB).

There are many places on the net that seel memory specifcally for your config. I buy mine from OWC (macsales.com).