EDGE memory upgrades provide maximum power speed quality and reliability. The trademarked distinctive blue edge that appears on all EDGE memory upgrades is our assurance to you that you have purchased a top quality memory upgrade that meets or exceeds the OEM s specifications and has passed through rigorous quality control processes. All EDGE memory upgrades are double tested prior to shipment and backed by a lifetime warranty. 1 GB memory smoothly executes complex apps and games DDR2 SDRAM operates at up to 400 MHz data bus speed with minimal power consumption and as a result you get optimal computer performance with an improved memory heat dissipation Up to 667 MHz speed is enough to run heavy software smoothly while surfing web with dozens of tabs open