Então, aqui está a resposta
The machine technically has 2 slots, but only one is user accessible, the other is soldered on
The machine can come with the following configs 4 GB - 1 x 4GB module in replaceable slot 6 GB - 1 x 4GB module in replaceable slot + 1 x 2 GB onboard memory 8 GB - 1 x 8GB module in replaceable slot