Product Details Fangrui Product Details Full Tested.before Shipping Memory Name: Desktop Memory Memory Capacity: 4gb Memory Frequency: 667mhz/pc2 5300 Memory Type: Ddr2 Applicable Models: Desktop Number Of Pins: 240 Pin Pins Of Memory Rams 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 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 Before Purchasing Rams, Please 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 Of Different Batches Of Products Is Slightly Different, Which Does Not Affect The Use Colour: Silver Material: Metal +pcb Size: Length: 13.3cm Package Contents: 1 X Ram Memory Only The Above Package Content, Other Product