Full Details from Amazon.com : http://www.amazon.com/gp/product/B009WIW9GE?tag=onigi-20
Patriot for Ultrabook 8GB DDR3 1600MHz PC3-12800 CL11 SODIMM Memory PSD38G1600L2S
PC3-12800 1600MHz Data Rate
204-Pin Dual in-line memory module
Non-ECC Unbuffered SODIMM
5 Rank Double Sided Module
78US Refresh Interval 8192 CYCLES64MS
135V Power Requirement
