Selling TWO 4GB (8GB total) Hynix DDR3 PC3-12800 RAM modules.

$50 for both. Will not sell separately.

The modules were removed from my mid 2012 MacBook Pro after about 1 year use, so these two should have plenty of life left in them. They should work in a variety of other laptops as well (other PCs and Macs), but please double-check that they work with your laptop before you buy!

According to Hynix website:

SK hynix Unbuffered Small Outline DDR3 SDRAM DIMMs (Unbuffered Small Outline Double Data Rate Syn-chronous DRAM Dual In-Line Memory Modules) are low power, high-speed operation memory modules that use SK Hynix DDR3 SDRAM devices.

These Unbuffered DDR3 SDRAM SODIMMs are intended for use as main memory when installed in systems such as mobile personal computers.

Features
VDD=1.5V +/- 0.075V
VDDQ=1.5V +/- 0.075V
VDDSPD=3.0V to 3.6V
Functionality and operations comply with the DDR3 SDRAM datasheet
8 internal banks
Data transfer rates: PC3-12800, PC3-10600, PC3-8500, or PC3-6400
Bi-directional Differential Data Strobe
8 bit pre-fetch
Burst Length (BL) switch on-the-fly: BL 8 or BC (Burst Chop) 4
On Die Termination (ODT) supported
RoHS compliant
This product is in compliance with the RoHS directive.

More information here:
http://www.amazon.com/PC3-12800-1600MHz-non-ECC-Unbuffered-HMT351S6CFR8C-PB/dp/B00A8J2OUM
https://www.skhynix.com/products/computing/view.jsp?info.ramKind=20&info.serialNo=HMT351S6CFR8C