G.Skill F3-1866C11S-4GRSL Ripjaws RSL SO-DIMM DDR3 RAM G.Skill 4GB (1x4GB) Single 1866Mhz CL11 1.35V

Brand - G.Skill, Size - 4GB (1x4GB), Channel - Single, Speed - 1866Mhz, Latency - CL11, Voltage - 1.35V, Timing - 11-11-11-32