Only you know your clients requirements. Are you saying that you are going to give him a quote for a workstation yet you do not have the knowledge to give that quote? Perhaps your client would be advised to find another consultant.
Was going to say the same thing. If you have clients and don't have the know-how to provide for their needs, they should not be your client.
Anyways... if you just read the sales specs of any PC, it will tell you what model of processor it has.