Hopefully you have PC Case with generous room around the motherboard (specifically, a standard or wider case... say
20cm or wider). Check your case's dimensions on a search engine or measure it yourself).
As
Paladin said you might need to remove your Motherboard (which means almost entirely disassembling your computer) to install the cooler's
backplate. It'll take an hour or two and should only be attempted if you're comfortable working inside a computer and the warranty (if any) is already void or you don't mind voiding it yourself.
If you've got spare cash consider an all-in-one
Water Cooling Unit such as an
NZXT Kraken X-42 (
https://www.nzxt.com/products/kraken-x42 ). It's quieter than an air-cooler, won't get nearly as dusty and will keep the CPU much cooler than air-cooling solutions. The only downside is you'll need to uninstall one of your case's case-fans to replace with the Kraken's own case fan.
Do your case measurements to make sure anything you're considering will fit.