Misco Simply Saver 16GB PC3-10600 DDR3 ( 2 X 8GB modules ) RAM £58.74

Misco currently have a cheap deal going for RAM.

It is a 2 x 8GB of DDR3 RAM PC310600 1333Mhz Speed and this is meant for a desktop.

http://www.misco.co.uk/product/2166710/Simply-Saver-16GB-PC3-10600-DDR3-2-X-8GB-modules-RAM