Nemozes mat 3GB RAM a 2 volne sloty, to je nezmysel. Spust si tam CPU-Z a napis sem jake tam mas teraz presne RAM moduly. Ak mas 2GB + 2GB tak uz dalsiu RAM kupovat nemusis nemalo by to na XP ziaden efekt (32bit OS vidi max 3,neco GB a viac ani nepotrebujes).

P.S. ak mas nahodou nezmyselnu kombinaciu 2GB+1GB tak 1GB vyhod a kup presne stejnu 2GB nech to pojde v dualchannel.