Note: Server motherboards,Non ECC, Non RECC, Non Desktop, confirm whether it is appropriate purchasing stands for Fully-buffer DIMM, which is a serial transmission technology that can improve memory capacity and transmission bandwidth. It is a new type of memory module and interconnection architecture developed by on the basis of DDR2 and DDR3. FB-DIMM can greatly improve the system memory bandwidth and greatly increase the maximum memory capacity. Capacity: 8GB Speed: DDR2 667Mhz Number of Pins: 240 pins Type: Memory Ram Voltage: DDR2 1.7V Read First The Recognition of XP is around 3GB The Recognition of Win 7 32Bit is around 2.26-4.5GB The Recognition of Win 7 32Bit is around 8-16GB purchasing , confirm which model is suitable for your Desktop/Laptop, usual models are as bellow: PC2 4200 = DDR2 533MHZ PC2 5300 = DDR2 667MHZ (Compatible with DDR2 533MHZ) PC2 6400 = DDR2 800MHZ (Compatible with DDR2 667MHZ, DDR2 533MHZ) PC2 8500 = DDR2 1066MHZ The appearance and color of different batches of products may be different, which will not affect the use size: 13.3cm Material: Metal+PCB colour: blue + green Package Contents: 1 x 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.