Many of Intel and AMD's high-end processors don't come with a CPU cooler in the box, so you have to buy one separately. Thankfully, Cooler Master's excellent MasterLiquid ML240L liquid cooler is now on sale for $66.99 on Newegg, a savings of $8 from the usual price. If you're willing to send a simple rebate card off to Cooler Master, you can save another $25 in the form of a prepaid Visa card, bringing the total cost down to just over $40.
This is Cooler Master's Lite ML240L model, which uses a Dual Dissipation pump for efficient cooling and two 120mm RGB fans. It should fit just about every PC, but those of you with small cases might be out of luck. The cooler is also equipped with kink-resistant tubing, so you don't have to worry about water being blocked. The MF120R RGB fans are advertised as compatible with Asus Aura, ASRock RGB, Gigabyte Fusion, and MSI RGB software.
It's worth noting that this isn't the similarly-named ML240L RGB V2, which is the newer model released last year. That one goes for $85 on Amazon, and uses an upgraded dual-chamber pump.
Cooler Master MasterLiquid ML240L RGB | $66.99 (save $8)
This excellent all-in-one water cooler works with Ryzen and Intel LGA1200/1151 CPUs. Enter code 93XQP32 at checkout to get the discount.
If this isn't exactly what you're looking for, have a look at our roundup of the best CPU coolers. We have recommendations from several manufacturers at varying prices, so there's bound to be something you like (and keeps temperatures down on your PC).