i have Intel Pentium 4-524 Processor (3.06-GHz, 533-MHz) with windows xp professional sp2.
currently i hv 1GB RAM.
What is the maximum RAM it can support??
Short answer: Put 2 GB in it and it will be guaranteed to work. If you need more than that, you should upgrade to a current desktop with a current 64-bit OS.
Long answer: Windows XP 32-bit only supports around 3 GB of RAM. If you ever decide to upgrade to a 64-bit OS to support more RAM than that, the maximum amount of RAM you can support depends on the motherboard. The amount supported is going to range from 2 GB to 16 GB depending on if your motherboard has two or four memory slots and supports DDR RAM or DDR2 RAM, and if it supports DDR2 RAM, how large of modules it supports.