Why can't I add attribute values to a product that I'm receiving?

Problem

When I am attempting to receive a tablet into RazorERP it has very specific values for CPU speed and TYPE for the SKU affecting values. However, this tablet has different values than are allowed by the system so I was forced to leave the fields blank. Values are for CPU: Core M-5Y70 (not an option) and speed: 1.1GHz (also not an option.) Can this be changed to accept new values?