All coolers shipped by ARCTIC are already compatible with LGA1851/LGA1700 processors. Coolers purchased from resellers may have been delivered without the corresponding accessories. In this case, please contact our customer support.
Some products have been shipped with wrong screws making the assembly impossible on AMD AM4.
The incriminated screws are
You can replace them using M3x5 screws, commonly used for mounting 2.5" SSD or HDD.
Please contact us through the contact form to get free replacement screws shipped to you.