The box is an Empeg box. Rio boxes look different. The unit you bought could be an Empeg Mk2 or RioCar Mk2a. It is most likely IMHO that it is an Empeg Mk2. That means it has 12MB of RAM. This is not a bad thing... yet.

The Mk1 had only 8MB of RAM and it can do anything the Mk2 and Mk2a can do. The official Empeg software will likely never require 16MB, so it's not a big deal. 3rd party efforts in the future (such as GPS, etc.) may require the extra RAM but it's unlikely.

I have an Mk2 and a few Mk2a's. I use the Mk2 daily with no desire to upgrade. If however, you're put off by having the Mk2, i will swap you for an Mk2a 10GB if you want.