These modules are for LAPTOPS. They are TWO sticks of 4GB (1333Mhz speed) SODIMM RAM which amounts to 8GB in total. I pulled them from my working Dell laptop, but I upgraded my laptop with two 8GB sticks making my personal laptop a 16GB machine so I am selling these solely because I no longer need them or have any other laptops to put them in. 

PLEASE check your laptop spec before trying to purchase these to make sure the sticks are compatible. A good rule of thumb is that any laptop that uses a Sandy Bridge or Ivy Bridge intel CPU will be compatible.