I have a HP Pavillion ZV5000 laptop. it currently has 512meg of ram in it. 2 256 DDR SDRAM @333mhz One of the chips are set into the motherboard, and the other one is in the memory slot on the back. I am looking at this: http://www.zipzoomfly.com/jsp/ProductDetail.jsp?ProductCode=85016-72 it is a 1gig DDR2 533mhz chip. my question I know this is a better chip, but will it work or even mess up my laptop by putting it in? thanks in advance.