4GB Kit ( 2x 2GB ) DDR2 800 MHz ( PC2-6400 / PC2-6400S ) DDR2 SO-DIMM ( 200-Pin ) Non-ECC Unbuffered 1.8V - DDR2 Standard Voltage High performance Memory RAM upgrade designed for DDR2 SODIMM compatible Laptop, Notebook, & All in One (AIO) computers Boosts the performance of your system by speeding up loading times, improving system responsiveness, and increasing your system's ability to handle greater workloads All modules undergo quality assurance testing to ensure dependable and reliable performance Please verify the supported memory (RAM) specifications of your system prior to purchase to ensure compatibility A-Tech provides a Lifetime Warranty for all orders & offers complimentary United States based Tech Support before, during, & after your purchase