gil1961taylortelnet :
can I use either or (ECC or Non-ECC)in my HP a1310n media center edition 2005 as long it is 400/300 MHZ 184 pin?
I agree with every other posts, your system does not support ECC memory only Non-ECC memory. Yes, either 333MHz or 400MHz 184pin memory will do. Supported memory sizes: 256MB, 512MB and 1GB. Sites where you can find the memory ex:
memorystock.com, memoryx, Kingston, crucial etc.
Good luck with the upgrade.