1GB DDR2 PC4200 Memory Upgrade 4 Gateway Notebook MX1023, MX1023H, MX1025, MX1026, MX1027, MX3140m Notebook, MX3141m, MX3142m, MX3210, MX3212, MX3215, MX3225, MX3228, MX3230, MX3230H, MX3231, MX3301j Technology: DDR2 SDRAM DENSITY: 1GB PIN COUNT: 200-pin Speed: PC2-4200 CL: CL=4