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The Lenovo Y50-70 uses White listed WiFi cards. This is from Y50 70 UHD how to change wifi card model - qualcomm to broadcom
You need to remove the back cover (12 screws) then you can replace the WiFi card with a supported one only.The system Motherboard has a whitelist which let's you use only supported WIfi cards,
You can check the list here
http://download.lenovo.com/consumer/...series_hmm.pdf
Using a Card that's not on the List may give you an Error that prevents the system from booting up.
Tear down instructions here: Tear Down Lenovo Ideapad Y50-70: How to update RAM, Hard Disk and LCD - YouTube
Where can you find the advance TCP/IP screen in windows 10 please? I have searched for it with no luck.
Your form factor is M.2
For the Intel 7260ac, the model # is the 7260NGW, however you could also utilize the newer 2015 tri-band ac card, the 18260NGW (only if your laptop has three antennas, otherwise go with the 7260ac). I know very little about the latter and am not sure on the price, however I do know the 7260ac is in the $25 - $30 range from most U.S. retailers.
- Intel does not sell directly to consumers, as their view is a consumer should only receive their wifi card through an OEM. It's important if you ever request tech support from Intel, you tell them the card came installed in your laptop from the OEM.
To echo what I said earlier, it is important to buy intel wifi cards from reputable vendors, as their cards are frequently counterfeited by China and other Asian countries. The counterfeit cards are inferior and you will have poor signal quality and speeds. I know I saw Office Depot offering one for ~$27, however shop around, and ensure you buy from a reputable vendor.
Ok ,but still! As I see on eBay , there isn't any card similar to mine. The bottom part is 2 parts. Those I see are three parts. Are they compatible with mine or they are other type?
As long as there an M.2 form factor with the main slot in the correct position, the card should work. I don't have a an M.2 interface, however I do know some PCIe cards come with multiple slots, with the only one that matters being the main separator slot. Do some research on Google, but more likely than not, it should be fine.
Also, ensure you buy the ac version, not the n version, as there's a 7260ac and a 7260n card. Be mindful of the center grounding screw, as the M.2 cards come in two variations in looks like, one being the center grounding hole, the second being two grounding holes on either side (unless your laptop also has screw holes to the left and right of the center grounding one).
- Check out this write up about the M.2 interface. It talks about both wifi cards and ssd's
Also, I don't recommend buying one on eBay, unless it's from a large retailer's ebay store. I bought mine a few months after it was RTM by Intel on eBay, however Intel's support forums are filled with people who've bought cards on ebay and Amazon, only to discover they're a counterfeit card weeks or months later.