M.2 Slot in EliteBook 840 G6

[adnane27]

Hello everyone,

I have an EliteBook 840 G6 that has an empty M.2 slot reserved for a WWAN card, I was wondering if it is possible to put an M.2 SSD in there, 

Thanks in advance.

[partof]

I think it's possible, according to this article you will need M.2 B+M keyed SATA SSD of appropriate physical size, but this configuration is not documented nor supported by HP.

This means anything could happen, you can fry your laptop, fry new M.2 SSD, nothing will happen and SSD won't be detected by BIOS, or it will work as intended.

Too many precautions, measurements, pin and PCB traces, etc, have to be performed before attempting this "upgrade" to be sure it will be safe.

Personally, I don't think its worth the risk, keeping in mind the small size of SSD, that can't even be a fast NVMe type.

[banhien]

@adnane27 

Sorry for jumping in. Physically the slot connectors may be the same but the controller behind is difference.  Normally there are 3 types (called sockets) of M.2 slot

Socket 1 is designed for Wi-Fi, Bluetooth®, NFC and WI Gig

Socket 2 is designed for WWAN, SSD (caching) and GNSS   - you are talking about this one

Socket 3 is designed for SSDs (both SATA and PCIe, up to x4 performance)

In theory you can put a short SSD for cache but talking about M.2 SATA or NVMe, it is not recommended because you won't get speed.

Regards.