The Crucial CT51264AC800 is a SO-DIMM DDR2-800 Memory for laptop computers.
- model CT51264AC800
- DDR2-800 PC2-6400
- 512Mb x64
- CL 6
This memory is JEDEC compatible but check your machine hardware to be sure it can recognize 4GB memory modules.
Many machines are limited to 2GB module to to BIOS limitations. Check for a BIOS update and inquire with the manufacturer for use of 4GB memory modules. Lenovo T61 is know to work.
We have some HP/Compaq netbooks which use a single DDR2 memory stick and they do not work with the 4GB sticks at all due to BIOS limitations and whitelisting.