Reddit mentions of Kingwin Fan Controller 4 Channel w/ LED. Controls up to 4 Sets of PC Computer Fans, Independent Turn Knob Control, and Fits 3.5 Inch Drive Bay. Easy Setup, and Easy Control of Your Cooling Fans (FPX-001)

I have used this one before: https://www.amazon.com/Kingwin-FPX-001-Controller-Controls-Independent/dp/B00DP9WRZY

And it works great! You can hook up to 4 fans to it and to control the speed just turn the knob.

Then you will wanna buy something like this: https://www.amazon.com/Vantec-SATA-IDE-Adapter-CB-ISA225-U3/dp/B01E7EPKUO

So the fan controller has a MOLEX adapter for power. The data to usb has a MOLEX to power cable in the box (I’ve had a few and the vantech one that I listed should have an inline power button).

I’ve tried splicing the cables and although that works this is far far easier and effective. I hope you see this before you buy to many other solutions because I personally think this is the easiest.

Good luck and happy growing :)

Have you already bought the fans? If not I’d say go with the AC Infinity MULTIFAN S3, Quiet 120mm USB Fan for Receiver DVR Playstation Xbox Computer Cabinet Cooling ones by ac infinity. They have a controller in line and it’s plug and play, no secondary power sources to power the controller to go back to the fan.

I originally got this fan controller with the two recommended buys which are the 4 pack of fans and a molex power supply.

This will let you have 4 fans all controllable. So you can always have two buckets side by side in the future and have them share a fan controller. That is what I was going to do, but ended up going with the prewired because of the fan cfu between then and easy I’d install.

Hope that helps. Sorry it didn’t use your adapter, but you can always use that for a 1-2 meters of led strip if it’s 2A

Just found this lovely device I've got marked to snag

Oldie but a goodie: this Anandtech thread says exhaust is more important. I'd invest in a fan controller - this one looks like it might be decent.

You could do a cheap fan controller like this.

The better question is why in the world do you want 6 fans?

But, to answer your question:

fan controller

Controlling fan speeds individual is difficult let alone accessible by software unless you've got multiple headers. Closest solutions I've seen are bulky (link below) or using a custom solution like raspberry pi to control speeds by communicating with host computer

https://www.amazon.com/Kingwin-FPX-001-Controller-Controls-Independent/dp/B00DP9WRZY/ref=pd_aw_sbs_147_4?_encoding=UTF8&pd_rd_i=B00DP9WRZY&pd_rd_r=bbf8ae20-de87-4cb7-b07f-d6014a9257e8&pd_rd_w=J2vra&pd_rd_wg=fUIHz&pf_rd_p=eb968aa8-26af-4aeb-99f6-3d185cf2f412&pf_rd_r=G03AQ34WVWPMF3E14CZV&psc=1&refRID=2CKFCB89WY421M2S9380#

You can for the CPU fan, but also use some GPU overclocking software to modify its fan. If you want to control more fans, you can either get a manual fan controller(can use regular fans) or get a PWM splitter(will need all PWM fans) to use the motherboards CPU PWM control to control all PWM fans.

http://www.amazon.com/Phobya-3-Way-Splitter-Single-Connection/dp/B004CLFOK4/

http://www.amazon.com/SilverStone-System-Cables-Black-CPF04/dp/B00VNW556I/

http://www.amazon.com/Kingwin-Channel-Multi-Fan-Controller-FPX-001/dp/B00DP9WRZY/

You likely won't find a controller that goes direct wall to controller, you need a transformer of some sort in there so you don't just blow the thing up, hence why most run off a MOLEX or SATA power connector off a PSU. This is the controller I was planning on using: https://www.amazon.com/Kingwin-FPX-001-Controller-Controls-Independent/dp/B00DP9WRZY?ref_=fsclp_pl_dp_3&th=1, it uses MOLEX connectors. For that you could adapt a spare 4 pin PCI connector I guess?

As for the splitters: http://lmgtfy.com/?q=3+way+fan+splitter+amazon

Do take note, your fans must be PWM to use this controller. If you have fans that only have 3 pins, or only molex, you'll need something like...

3 pins:
https://www.amazon.com/Kingwin-Channel-Multi-Fan-Controller-FPX-001/dp/B00DP9WRZY

Buy a couple of splitters or a dedicated fan controller. Some cases have a fan controller built in.

No need for 5 controllers. Here, take a look at some of these:

https://www.amazon.com/Sentry-5-4-Inch-Controller-Cooling-AC-SEN-3-B1/dp/B00KJGYLNM/

https://www.amazon.com/Phanteks-PWM-Fan-Controller-PH-PWHUB_01/dp/B00M0R05WE/

https://www.amazon.com/dp/B0156YBCKG/

https://www.amazon.com/Kingwin-FPX-001-Controller-Controls-Independent/dp/B00DP9WRZY

Basically all you need is a “PWM Fan Controller Hub”. You connect all the fans to the hub, and the hub (depending on which style/type you get), can either be controlled manually via knobs or interface (usually mounted in a 5.25 bay), or connected to the mobo’s CPU fan header, and can be controlled through specific software. The NZXT hub allows control via software like this.

I'm not seeing a fan header but this shows what they look like. They do make fan controllers that you can buy that can either be manually controlled or software controlled. Something like this will fit in a 3.5 inch drivebay and offers manual control of up to four fans.