Memory for P4i65GV

Kingston or Apacer DDR 333/266, your board can support up to 2gig

Well it looks like you have 2 slots on that mobo so yes, 2 1GB cards would be pretty good. You could buy two 2gb cards, it depends really on how fast you want your computer to be. If you have a large HD, such as anything over 500 gb then I would say get two 2 gb cards. If it is under that, then there is no need. The larger cards are for larger HD's because they have more space to search when it looks for something and needs more speed. Hope this helps. Cheers.