Hi friends,
I have brought one Dell inspiron 1525 , RAM = 1gb only. SUPPLIER saying that it can upgrade up to 4gb , if i do it this what will be the deference , please advise me details, and i am looking for car kit also ,some car kit are available in the market but not suitable to inspiron 1525, if i go for an ac converter can raise any problem in the "SMPS" please advise me

Thnaks dear frindsWhich OS does it have.  If it has Xp depending on what applications you run 1GB is ok and 2GB is great.  Any more than 2GB with XP and you won't see any BETTER PERFORMANCE.  If it's Vista then I'd say you'd want 2GB at least unless you're not in a hurry to get anything done.  Now there is also different flavors of Vista.  Bussiness, ultra, ext.  Also there is 32 bit and 64 bit.  If you have ultra I'd go with 3GB.  Any More than 3.5GB would be a waist with a 32 bit system because that is all it would see.  Also keep in mind that if your memory is DDR2, then you need 2 identical CHIPS to get full performance out of them.