NEW Samsung 4GB X 1 DDR3 1600MHz RAM
4 GB X 1 memory 

I upgraded to 4GB X 2 memory as soon as I got my new Thinkpad X230 last weekend, so these haven't even been used. Very easy to self-install and increases computer speed with more RAM.

Specs:

Producer: Samsung

Module Size: 4GBx1
Package: 204-pin
SODIMM 

Feature: DDR3 PC3-12800 1600 MHz
Price: 15 dollars (price in amazon is 29 dollars)

E-mail me with more questions.
You pick up on Stanford's campus (Huang Engineering Center) or EV.

Thanks!