I went and had a look in my parts bin.. Yes there sits my blue Gigabyte AMD mounting pieces.
You remove the plastic parts and install CM's screw standoffs with your existing backplate.
I never installed my AMD cooler, it's still new in the box.
Most cases have a cutout so you can get at the backplate. Take off the rear cover.
----Mostly you need to keep the backplate from falling off and to hold it there when you put the CM standoffs in. Make sure they are fairly tight when your all done do a final tightening so they don't spin when you install or remove the cpu cooler mounting screws.
-A trick that worked for some older cases that doesn't have the cutout is to only take one bracket off at a time and carefully start the standoffs then tighten them. -CAREFUL cause the backplate will be springy and only held on by 2 screws at one end.
I found i needed a really long Phillips bit or screwdriver. I think the later ones now include one.
It's a awkward cooler to install, you must hold it flat and start one screw with a few threads and then push down and start the one on the diagonal without crossthreading it.
Watch out the Phillips screw heads are made of cheap\soft metal and seem to want to slip and strip the screw head easily. (It's best to screw them gently to the end and then back it off a half or 1/4 turn, so they don't stick and jam when you take them off. )
-The included CM paste is fairly good. Of course there are better pastes too.
- I found the CM fan is fairly quiet so you can either go with a more aggressive fan profile or just set it to run always 100% fan speed. A second cpu cooler fan helps but is not the big drop in temp like you would expect. Something like a extra 2-5C drop. Having decent case cooling likely helps more.