Extra device PCG GRT815M?

[opie]

Hallo,
I do have a PCG GRT815M. On the bottum there are two slots one for the memorycards (max 2) and the other cabin is empty and I do not know what extra device can be plugged in here.
Who knows??

[feederfan]

There are normally 3 'hatches'
one is for RAM Memory
one is for the Hard drive
and the empty one in your case will probably be a mini PCI slot, vaios that have inbuilt wireless lan have a card installed here. Also, bluetooth modules can go in this slot.

[opie]

You are corect 3 slots.
Thanks for your answer!