Hello Chuck,
I did some research based on the information you provided and was unable to pinpoint exact specifications for you. I can however, provide you with information that should help answer your question. The following link is from crucial.com which offers a free download that will scan your system and tell you exactly what RAM you currently have installed and make recommendations on what is compatible for your system along with other helpful tools. It also provides you with instructions on how to download and install it. This is a very reliable site and I use it often to help clients. The next site can also be beneficial to provide you with information systemax.com which is a support site and can help you with problems, information, drivers, etc. It asks for your serial number of your system, which should be located on a sticker or label someplace on the outside of your system.
I would recommend that you try the crucial link first as it will be the easiest and fastest tool to use.

I wish I could provide you with a rock solid specific answer right now, but these tools will help you find the answer you are looking for or can be used in the future if you need them. Please let me know if you need further assistance and I will do my very best to help in any way I can. I wish you the very best and I hope you find the information useful to help solve your problem.

If you would not mind, please rate my help. I would greatly appreciate it. Thank you