Apple MacBook Pro (13-inch, Early 2011) - Manual (Page 44)

44 Chapter 3 Boost Your MacBook Pro
Installing Additional Memory
Your computer has two memory slots that you access by removing the bottom
case. Your MacBook Pro comes with a minimum of 4 gigabytes (GB) of 1333 MHz
Double Data Rate (DDR3) Synchronous Dynamic Random-Access Memory (SDRAM)
installed. Each memory slot can accept an SDRAM module that meets the following
specifications:
 Double Data Rate Small Outline Dual Inline Memory Module (DDR3) format
 30 mm (1.18 inches)
 204-pin
 2 GB or 4 GB
 PC3-10600S DDR3 1333 MHz Type RAM
You can add two 4 GB memory modules for a maximum of 8 GB of memory. For best
performance, fill both memory slots and install an identical memory module in each slot.
To install memory in your MacBook Pro:
1 Follow steps 1 and 2 beginning on page 37 to remove the bottom case.
Important: When you remove the bottom case, you expose sensitive internal
components, which can be affected by static electricity.
2 Before touching the memory assembly, discharge any static electricity from your body
by touching a metal surface inside the computer.