RAM & Memory Upgrades
G. Skill Ripjaws-X Main Memory 8 GB 2133 MHz 240-Pin 2x 4GB, CL9) DIMM DDR3-RAM Kit
G.Skill Ripjaws-X F3-17000CL9D-8GBXM - DDR3 - 8 GB : 2 x 4 GB - DIMM 240-PIN - 2133 MHz / PC3-17000 - CL9 - 1.65 V - ungepuffert - nicht-ECC
https://www.bizrate.co.uk/ram_memoryupgrades/g-skill-ripjaws-x-main-memory-oid4552562913.html