Asus SABERTOOTH Z170 MARK 1 Instruction Manual page 51

13. M.2 socket 3
This socket allows you to install an M.2 (NGFF) SSD module.
• This socket supports M Key and type 2242/2260/2280 storage devices.
• The M.2 Socket 3 shares bandwidth with PCIe x16_3 slot.
The M.2 (NGFF) SSD module is purchased separately.
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