2GB PC2-5300 DDR2-667 200pin SODIMM. MAX MEMORY: 4GB SOCKETS FOR UPGRADE: 2 If 4GB is installed, the recognized memory may be reduced to 3.5GB or less (depending on system configuration and memory allocation). Genuine CMS brand, CMS is one of the most trusted names in the Computer Memory industry and this product carries a Lifetime Warranty from CMS Compatible with: Fujitsu-Siemens LifeBook T Series T2010 Fujitsu-Siemens LifeBook T Series T4210 Fujitsu-Siemens LifeBook T Series T4215 Fujitsu-Siemens LifeBook T Series T4220 Fujitsu-Siemens LifeBook A Series A6010 Fujitsu-Siemens LifeBook A Series A6010 Fujitsu-Siemens LifeBook A Series A6025 Fujitsu-Siemens LifeBook A Series A6030 Fujitsu-Siemens LifeBook A Series A6110 Fujitsu-Siemens LifeBook A Series A6120 Fujitsu-Siemens LifeBook C Series C1410 Fujitsu-Siemens LifeBook E Series E8110 Fujitsu-Siemens LifeBook P Series P7230