M.2 Key-M(female) to key-B(male) adapter for Thinkpad t440p+ADT R43SF(M.2 key-M)
I am trying to find an adapter that converts m.2 key-M to Key-B so that I can connect the ADT R42SF m.2 to PCIe adapter to my thinkpad t440p. I have found a adapter that does the right opposite. I don't understand why the chinese haven't mass produced these yet(maybe they did but I am being a blind idiot). if someone can send me a link to this adapter I will be really happy and if I am missing something and it is not going to work can someone please explain why.
M.2 key-B to M.2 key-M - https://www.amazon.com/Sintech-Adapter-Replace-Sandisk-Ultrabook/dp/B00MC9IH4S -
I need the ports to be switched(male m.2 key-b & female m.2 key-m)
thinkpad t440p M.2 slot
Key-B is usually used for SATA, but lenovo is using this slot for WWAN cards so I am pretty sure they use PCIe for that.
key-b & key-m differences
1. WWAN is USB
2. male m.2 key-b to female m.2 key-m is not really possible because the latter presumes 4 PCIe lanes while the former provides two. Of course there are laptops like the T470/T25 (mine) which only have two PCIe lanes in their m.2 key m slots, so it should be possible but no one produced such a gimped adapter.
The T440p has an A and a B key m.2 slot (source) and you could give up the WLAN card (and use an USB WLAN instead) and use either https://www.ebay.com/itm/222772775554 or more expensive but better quality https://www.ebay.com/itm/252826344550
thank you for the reply
even if the adapter is gimped it is not impossible. I decided to design my own PCB. I don't want to use m.2 key A/E because it is 1x(4gbps), I want to get 8gbps(2x) atleast. if lenovo routed the PCI-E lanes to the m.2 slot then I might be able to finish this small side project of mine.
hey bossunselo, any news on your experiment?
I'm very interested to know if you were able to keep experimenting (I also read your post on reddit here: https://www.reddit.com/r/thinkpad/comments/7rf2rx/external_gpu_on_t440p/)
I don't know if it could be useful, but while browsing I stepped into this old post where a guy is talking about an unpopulated third m2 keyB slot on the T440p: http://forum.notebookreview.com/threads/t440p-third-m-2-ngff-slot.769944/
Hope to read some news from you