If you already have the computer you can check out the specs in greater detail using CPU-Z from this site:
http://www.cpuid.com/softwares/cpu-z.html*Be sure to
uncheck the 3 boxes during install asking to add toolbar and change your default browser info. I just installed the latest version and was surprised they had that in there. I guess that's how they make their money to support that tool.
There is a memory (SPD) tab as shown in the attached pic that will show you all sorts of info about your memory. Its best to replace original ram with same speed, so if the original ram is 1066 replace with 1066 or if 1333 replace with 1333 to ensure best compatibility.
I looked all over the web and found no information stating the ram speed for that system, just that its DDR3 and DDR3 has like 8 different speeds, but this box is more likely to be a budget box with the slower ram.
[regaining space - attachment deleted by admin]