Try using a program like CTSPD.
Please visit <b><A HREF="http://www.ncix.com/shop/index.cfm?affiliateid=319048" target="_new">http://www.ncix.com/shop/index.cfm?affiliateid=319048</A></b>
link is broken.
there is sort of a program called memtest86+ but it is not exact.
pc wizard from cpuid.com gives detailed info.
for the OP, you can identify the RAM by the memory chips on it. look them up on google dilligently. them multiply out the size, bit widths, and qty and see what you come up with.