I have a Dell computer that had 64mb of RAM. I decided to upgrade with a further 216mb and go on to Broadband. Best thing I ever did, goes like rocket now.
For the Memory I used a company Crucial. They have an excellent web site full of tips and advice and choosing the type of memory was simple due to the information and help available on their site.
www.crucial.com/uk
Ordered it 14:15 on a Wednesday and it was here 09:30 next morning.
Regards
FBW