http://www.pcgamer.com/cyber-monday-cpu-cooler-and-fan-deals-2017/

The cooler that came with your CPU is fine for general use, but if you want to overclock, or keep your case quiet and your temps as low as possible, a nice CPU cooker is a great addition to a new build. Here are the best coolers we've found on sale for Cyber Monday:

The Corsair H100i 240mm All-in-One Liquid Cooler has a nice discount: it's $85 at Newegg, saving you $45.