The laptop has an MXM slot so it is possible, although it seems unclear whether it is an MXM I or MXM II module (the latter seems more likely IMO).
We have no confirmations of successful upgrades wither so far.
Check out this thread if you haven't done that yet.
To the contrary- since it's an MXM module it is possible, however not all cards will work. You may end up returning a card and ordering another one etc.
While it's not a hard task it does require a bit of research.