The standard 8GB configuration is shipped with two 4GB memory chips. My guess would be that a 16GB unit would have four 4GB chips since they'd simply fill up the remaining two slots.
They are probably not going to be able to tell you with certainty how it is configured, and it may vary, who knows. But this is what I would expect, to be 'safe'.
They are probably not going to be able to tell you with certainty how it is configured, and it may vary, who knows. But this is what I would expect, to be 'safe'.