Would an M.2 SSD have any effect on my current build?

Smiley Crack

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Jan 14, 2015
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Pretty straight forward, I'm building a new pc and have basically all my parts at my house ready to be installed except for a storage device. I am unsure whether if I should get a sata SSD or a M.2 SSD. I heard having an M.2 SSD can effect my computers performance or render a sata port useless. Is this true? And is it possible to install two M.2 SSDs with no impact? (my mobo has 2 m.2 slots). I am very unfamiliar with M.2 SSDs and want to make sure this will work right before ordering my final parts.

This is what pcpartpicker tells me. "The motherboard M.2 slot #0 shares bandwidth with a SATA Express port. When the M.2 slot is populated, one SATA Express port is disabled."

Here is my current build:
GPU: 2x gtx 1080 ti
CPU: i7-7700k 4.2 ghz
MOBO: Gigabyte GA-z170x-gaming 7
RAM: 16 gigs of TridentZ
PSU: HX1000i

Would having just one M.2 ssd effect anything? Would this bottleneck any of my current parts? Would this render my sata express port useless?

Also, I will only have one GPU for now and will be buying a second one later, will any problems occur once I add the second one? bottle necking?

Oh, and here is the M.2 ssd im interested in. https://www.newegg.com/Product/Product.aspx?item=N82E16820147594
 
Solution
Only a super fast M2 would be of any help, most of them are not any faster than SATA.
On some MBs, using M2 can turn of corresponding SATA ports but not all.

Smiley Crack

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Jan 14, 2015
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Thanks, I did some research and figured I'd just get one then do the rest as satas.