Please note: this memory is High Compatible for AMD motherboard, it does not fit ECC Server . 1600 MHz can be compatible with DDR 3 1333 MHz / 1066 MHz 1333 MHz can be compatible with DDR 3 1066 MHz Memory chip:16IC Type: DDR3 Laptop Memory Channel: Dual Channel Function: Non-ECC Memory Socket: Sodimm Frequency:1066MHz Number of Pins: 204pins Capacity:2GB(Optional) Voltage:1.5V 1066MHz =CL7 1333MHz =CL9 1600MHz=CL11 Unbuffered, Non-ECC, & Non-Registered DDR3 1066= PC3-8500 DDR3 1333= PC3-10600 DDR3 1600= PC3-12800 Pins of Memory Ram DDR for Desktop =184 pins DDR for Laptop =200 pins DDR2 for Desktop =240 pins DDR2 for Laptop =200 pins DDR3 for Desktop =240 pins DDR3 for Laptop =204 pins colour:Green Material:PCB size:7 x 3cm Package Contents: 4 x DDR3 2GB Laptop Memory Ram Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.