General description The 4GB DDR2 Laptop RAM is designed for enhanced performance in laptops, featuring a frequency of 667MHz and a capacity of 4GB. This SODIMM memory module is compatible with various laptop models and is ideal for upgrading your system's memory. Technical specifications Model: DDR2 SODIMM Capacity: 4GB Frequency: 667MHz Function: DDR2 Pin Count: 200 Pin Dimensions: 7x3 cm Compatibility and accessories Compatible with DDR2 533MHz (PC2 4200) and DDR2 800MHz (PC2 6400) Not compatible with DDR3 memory Common laptop memory models: PC2 4200, PC2 5300, PC2 6400, PC2 8500 Usage Windows XP recognizes approximately 3GB Windows 7 32-bit recognizes approximately 2.26-4.5GB Windows 7 64-bit recognizes between 8-16GB Other information Color: random colors Material: PCB Package Contents: 1 * RAM Measurement allowed error: +/- 1-3 cm Note: Light shooting and different displays may cause color discrepancies