Many high-end processors from Intel and AMD do not come bundled with a CPU cooler and must be purchased separately. Thankfully, Cooler Master's excellent liquid cooler MasterLiquid ML240L is on sale at Newegg for $66.99, $8 off the regular price. If you send Cooler Master a simple rebate card, you can save an additional $25 with a prepaid Visa card, bringing the total cost to just over $40.

This is Cooler Master's Lite ML240L model, which uses a Dual Dissipation pump for efficient cooling and has two 120mm RGB fans. It should fit almost any PC, but those with smaller cases may be out of luck. The cooler also features kink-resistant tubing, so there's no need to worry about water clogging; the MF120R RGB fans are advertised as compatible with Asus Aura, ASRock RGB, Gigabyte Fusion, and MSI RGB software.

It is worth noting that this is not the similarly named ML240L RGB V2, a new model released last year. It costs $85 on Amazon and uses an upgraded dual-chamber pump.

If this is not what you are looking for, check out our summary of the best CPU coolers. With recommendations from manufacturers in a variety of price ranges, you're sure to find something you'll like (and that will lower your PC's temperature).