OWC OWC8566DDR3S4GP memory module 4 GB 2 x 2 GB DDR3 1066 MHz

4.0GB(2x2.0GB Kit) PC8500 DDR3 1066MHz SO-DIMM 204 Pin PC3-8500 Memory Upgrade Kit for Late 2008, Early 2009, Early 2010 MacBook, MacBook Pro "Unibody" Models, 2009/2010 Mac mini, 2009 iMac, Late 2009 MacBook 13" Models.

Features
Internal memory:	4 GB
Memory layout (modules x size):	2 x 2 GB
Internal memory type:	DDR3
Memory clock speed:	1066 MHz
Component for:	Notebook
Memory form factor:	204-pin SO-DIMM
ECC:
Buffered memory type:	Unregistered (unbuffered)
CAS latency:	7
Memory channels:	Dual-channel
Memory voltage:	1.5 V
Module configuration:	128M x 8
Operational conditions
Operating temperature (T-T):	0 - 85 °C
Packaging data
Package type:	SO-DIMM