Crucial 8GB (2x 4GB) CL13 DDR3L-1866 PC3L-14900 1.35V / 1.5V DR x8 204-pin SODIMM RAM Kit for Mac (or PC) Speed_DDR3-1333 8V Technology DDR2 Error Correction

8V Technology DDR2 Error Correction ECC Signal Processing Unbuffered Form Factor 240-pin EUDIMM Ranks Single rank Configuration 9-chip 256M x8 Pieces in Kit 2 Compatibility

This 1GB (1x 1GB) DDR 400 MT/s Single rank

5V Technology DDR3L Error Correction ECC Signal Processing Registered Form Factor 240-pin RDIMM Ranks Dual rank Configuration 2048M x4 Pieces in Kit 2 Compatibility

Effectively they were putting Crucial stickers on Micron modules

Crucial 8GB (2x 4GB) CL13 DDR3L-1866 PC3L-14900 1.35V / 1.5V DR x8 204-pin SODIMM RAM Kit for Mac (or PC) Speed_DDR3-1333 8V Technology DDR2 Error CorrectionProduct Overview This 8GB (2x 4GB) DDR3L 1866 MT s Dual rank, x8 configuration RAM kit for Mac (or PC) from Crucial is for use in DDR3L compatible systems and operates at 1866 MT s with an overall transfer rate of PC3L 14900. This RAM kit also operates at a standard voltage of 1. 35V 1. 5V with a CAS Latency of CL13, and is designed to allow you to run more applications simultaneously, switch between them faster, and provide a smoother computing