Need some urgent RAM help please

My dad has a reasonably old notebook which has only 512MB RAM. Its a bit slow and for his uses if I upgrade the RAM to 1GB it should suffice. He only surfs, mails and uses Word/Excel.

The notebook is an Acer Travelmate 4002 WNLCi
The existing modules are two sticks of 256MB and CPUZ says:

DDR
PC 2700 (166)

Couple of questions:

1. What RAM of 1GB should I look at?
2. If I replace one 256 with 1GB and leave the other 256 in place will it work OK?

Would really appreciate any help here.

Thanks.

 

1. Any ram that supports DDR2700 and offers lifetime warranty.
2. That will work but it won't be running in Dual Channel mode anymore, while that isn't that big of a deal to most end users, some memory freaks out there will disagree.

 

Thanks for the info.

Will this RAM work?

http://cgi.ebay.in/ws/eBayISAPI.dll?ViewItem&item=120206254742&ssPageName=ADME:X:RTQ:IN:1123

It does not mention whether its a 2700 RAM or not and I dont have a clue.

Any chance of the laptop having more than two memory slots?

 

Ya that will work, it will downclock it if the memory is running a higher clock speed. And oh ya I think lifetime is only in US, didn't know you were in India, so 3 year warranty will be fine, just be sure to memtest it when you receive it!