Hi Neo_cortex,
Also if in the Hardware Maintenance Manuel, isn't write something about M.2 support, it doesn't mean that the Lenovo y700 15isk doesn't support it. In fact, first of all you must see the model specifications. Fadi217 ask abount the "Lenovo y700 15isk" and I also have this model, you can easy find that this model support M.2, so "seems" that the samsung 960 pro is compatible...
The problem is that nobody tell to the customer or take the responsability to say that you can buy a M.2 SDD and not have hardware problems etc etc... So as you can see there are different post wherein people ask the same thing about samsung M.2 SSD because they don't find, as me, an answer from Lenovo support. In fact some people try by himself to buy this SSD and after they make a guide for other people...
For now seems that someone was able to install a M.2 samsung 950 pro (there is a guide online but also in this forum) but at the end the reading and writing of this powerful SSD was limitated by the BIOS, here the link:
http://www.geektech.co.nz/lenovo-y700-samsung-950-pro
This guy in this post also try to contact lenovo for the BIOS upgrade and the answer was:
Response from Lenovo was initially encouraging that Engineering where going to look into it, however i received this reply that is less encouraging.
With regards to the issue reported, we have not received any updates from Engineering team and I checked with my supervisor on the issue and was advise we cant be certain when the new BIOS update will be available and what changes will be made as BIOS updates are rolled out based on need and specific to a customer's preference and since this is in regards to a 3rd party hardware, it is highly unlikely.
You can monitor our support website for when the next BIOS update will be available.
Should you have any further inquiries please contact us.
At this time if you want a laptop that you can add a high performance NVMe SSD to and unlock the full potential the SSD, Unfortunately the Lenovo Y700 is not it. Unless a BIOS update is provided which is sounding less likely after contacting Lenovo.