If you are adding to memory already in the system, what you buy must match what is in there already if you are leaving it in, or it will either not boot or recognise one or the other on cmos and ignore the other. Alternatively, you could remove the existing piece of ,memory and just put in a piece of 400mhz memory, this will automatically "backwards clock" to the slower motherboard speed if this is the case. Need more help? contact me on compdoctor2005@btinternet.com
Chris
November 2008
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