Elpida 2GB (1x 2GB) DDR3-1066 PC3-8500 1.5V x8 204-pin SODIMM RAM Module Form Factor_288-pin RDIMM x4 configuration RAM module is

x4 configuration RAM module is for use in DDR3 compatible systems and operates at 1600 MT/s with an overall transfer rate of PC3-12800

IBM/Lenovo Warranty Statement

5V Technology DDR3L Error Correction ECC Signal Processing Registered Form Factor 240-pin RDIMM Ranks Dual rank Configuration 36-chip 256Mx4 Pieces in Kit 1 Compatibility

but the effective rate is 667 megatransfers per second (MT/s) because there are 333 million rising edges per second and 333 million falling edges per second of a clock signal running at 333 MHz

Elpida 2GB (1x 2GB) DDR3-1066 PC3-8500 1.5V x8 204-pin SODIMM RAM Module Form Factor_288-pin RDIMM x4 configuration RAM module isProduct Overview This 2GB (1x 2GB) DDR3 1066 MT s, x8 configuration RAM module from Elpida is for use in DDR3 compatible systems and operates at 1066 MT s with an overall transfer rate of PC3 8500. This RAM module also operates at a standard voltage of 1. 5V and is designed to allow you to run more applications simultaneously, switch between them faster, and provide a smoother computing experience. Technical Specifications Part No. EBJ21UE8BDS0 AE F