M2 SSD connector type, NGFF NVME

Hi folks,

Recently, I have bought Samsung's PM951 M.2 SSD 256GB at online store for DELL XPS 1820 (18.4" Tablet PC).

But, somehow, connector is not fitted at all.

So, I have searched its different and found that followings:

There are two types of M.2 SSD.

1. PCI(x4) based M.2 SSD. there is one hole in connector (PM951)

2. SATA based M.@ SSD. there are two hole in connector.

I captured it from Taiwanese m.2 ssd to PCI adapter company.

So, I need to sell it