Want to change the memory, expert advice

Users questions: Want to change memory! Read, it seems that the memory of the two slots are inserted, but the configuration of the computer display is 1G of memory. Moreover, the computer took three years. Please look at the picture master, this is my home computer's configuration diagram. Want to change Article 2G of memory but do not know what is good for, for example, the price also not clear The hope of who introduced!! And then ask if inserted with the original 2G memory that can do two? Detailed please! ! ! Thank you
Experts answer: use this to know the motherboard model, and do what memory. http: ** www.ludashi.com * P42.8G, Memory 1G, XP system basic enough, and now the memory is more expensive, DDR4001G200 yuan, DDR28002G280 yuan, the memory in Task Manager the only 300-400MB memory upgrade would not have had. Original 1G memory is not small, not much improved for 2G, and the original To the difficult compatibility.
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