2GB Total. Four 512MB 64M X 64 Non-ECC 667MHz PC2-5300 240-pin Unbuffered DIMM (DDR2, 1.8V, CL5, Gold Leads). Desktop Memory.

Warranty: 2 years from date of purchase

Memory expert since 1990. All parts are tested and guaranteed compatible.

No hassle exchanges.Brand name parts only- No unknown and overclocked parts.

Quick shipping.

Guaranteed and tested. 100% compatible with many 533MHz PC2-4200 desktop systems including Acer, Dell, HP, Gateway, Lenovo etc.