G SKILL Ripjaws X Series DDR3 RAM kit. 

8GB kit (Part Number: F3-14900CL9D-8GBXL) consisting of two 4GB modules.

• Total Capacity: 8GB (2 x 4GB Modules)

• Type: DDR3 SDRAM

• Speed: 1866MHz (PC3-14900)

• CAS Latency: CL9 (9-10-9-28)

• Voltage: 1.50V (Standard Voltage)

• Format: 240-Pin DIMM

• Features: Intel XMP Ready, High-Performance Heat Spreaders