100% . Tested works perfectly . note: this memory is just for AMD motherboard, it does not fit motherboard or ECC Server . 1600 MHz can be compatible with DDR 3 1333 MHz 1066 MHz Memory chip:16IC, Type: DDR3 DIMM, Memory Channel: Dual Channel Function: Non-ECC; Memory Socket: Long--DIMM, Frequency:1600MHz, Number of Pins: 240pin Capacity:4GB 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 size:13.3*3cm Material:PCB colour:Green Package Contents: 1 * 4GB DDR3 Memory Ram Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.