Thermaltake 120 mm Riing RGB 3 pack for $39.99 at Best Buy

These are the same rgb fans I just bought for my build. They have a few major drawbacks, but at this price, those are easy to overlook, especially if you have any other best buy discounts. They'll work in any computer, which is a plus - they don't need an rgb header on your motherboard or anything like that. They come with everything they need except power, which you get from your motherboard. On the other hand, that means you have to have their proprietary controller to use them, and there's no syncing with any other lights in your case. And the biggest annoyance is that they can't be controlled by, software.  You're again limited to the little box unless you are comfortable with a soldering iron and you've got a spare Arduino lying around (one of my future projects). My understanding is that the box also controls the fan speed despite them being PWM fans that are basically designed for being able to respond to temperature changes when plugged directly into the motherboard, but I haven't verified that yet.

All in all though, this is a great buy if you want to add some multicolor bling to your computer, and maybe even get those temps down a couple degrees. They are high static pressure fans which means they can also be used to replace the radiator fans if you have a liquid cooler in your system with 120mm fans. And remember Best Buy's return policy means if you install them only to realize they're not going to work for you at all, you can take them right back, no questions, as long as it's within the 14 day return window.

But maybe don't do that after a failed attempt with the soldering iron, mmmkay?