Would an open ended laptop PCIe X1 slot allow for a X4 ssd card to be inserted and fully functional? I have three free slots on my laptop- HP envy 13 ab002na and would like to add an additional drive, I'm not sure if they are open ended but would that be possible if one of them was. If not what would be the best way to add an additional drive, if possible? All slots are version 3 BTW...