Repost of a previous deal, which is still running live - thought it prudent to repost as it's ideal for upgrading older systems that support DDR2 200 Pin DIMMs (i.e. Netbooks, Laptops, etc) as it's still a decent price IMHO.
Technical Details (from Amazon UK)
2GB DDR2 SO-DIMM
PC2-5300 ( 667 MHz )
256 X 64 bit (Industry standard configuration)
1.8 volt (DDR 2 Industry standard)
ByteStor recommend that you buy memory that matches your system. e.g. If you have a PC2-4300 system you should buy a PC2-4300 module. Please consult your computer handbook/ support services to confirm the type you require
Please check if your system requires memory in identical pairs (e.g. Dual Channel) In this case you will need to order two modules of the same capacity