Upgrade Mac book memory

Hello Mac Gurus,

I have a mac book with me and here is the configuration.

MAC book 2.4 Ghz Intel Core 2 Duo

memory : 2 GB 667 MHz DDR2 SD RAM.

Hard drive. 250 GB.

I am planning to upgrade to 4 GB memory.

Which is the best place to get the memory for cheap??

Also, which model do i need to choose?? I am not sure what does DDR 2 or DDR 3 means, plz advice me with ur inputs!!

Thanks in advance!!

Regards,
Magic kid

You'll find as many suggestions as there are members. I prefer datamem.com - they have a RAM finder that allows you to enter your specs and find the exact RAM you need. In addition, they guarantee that their RAM is mac-compatible - not something everyone does.