G.Skill 16GB Ripjaws X Dual Channel Memory Kit - Blue
http://www.amazon.co.uk/dp/B007CCV1TI?tag=dedik-21
Feature
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Compatible Slots:2 x memory - DIMM 240-pin, Technology:DDR3 SDRAM, Data Integrity Check:Non-ECC, Type:DRAM, Form Factor:DIMM 240-pin, Features:Intel Extreme Memory Profiles (XMP), dual channel , unbuffered, Voltage:1.5 V, Latency Timings:CL9 ( 9-9-9 ), Speed:1600 MHz ( PC3-12800 )
http://www.amazon.co.uk/dp/B007CCV1TI?tag=dedik-21