Jump to content

Welcome to Geeks to Go - Register now for FREE

Geeks To Go is a helpful hub, where thousands of volunteer geeks quickly serve friendly answers and support. Check out the forums and get free advice from the experts. Register now to gain access to all of our features, it's FREE and only takes one minute. Once registered and logged in, you will be able to create topics, post replies to existing threads, give reputation to your fellow members, get your own private messenger, post status updates, manage your profile and so much more.

Create Account How it Works

Plugging 4-Pin powered LED case lights to a motherboard's 3-pin po

  • Please log in to reply



    New Member

  • Member
  • Pip
  • 1 posts
Hi All,

I am building a computer that has LED lights built-in to the case. It looks nice, but I'd really like the lights to shut off automatically when the computer goes to standby/sleep mode. These lights are currently plugged in to the 4-pin MOLEX ports that go straight to the power supply.

I know that the fans shut off in standby mode when plugged into the 3-pin motherboard ports. My question is: Is there an adapter I can use to plug a 4-Pin MOLEX LED Light into a 3-pin motherboard port (typically made for fans)? If so, may I ask where I can find an adapter like this? (or is doing something like this hazardous to the motherboard?)

Thanks so much!
  • 0




    motto - Just get-er-done

  • Technician
  • 4,345 posts
Well, you could use one of these if you cannot find another way.


Theres also this.


Some light kits for desktop computers will come with a switch to allow the user to turn the lights on or off at any time. Many newer kits do this through a switch placed inside of a PC card slot cover. Others may have a larger switch that requires the case to be modified. This typically requires that a section of the case be cut out for the switch to then be mounted into.

No matter how the switch is mounted, this step is typically optional. Most lights can be plugged directly into the inverter meaning that the lights will turn on whenever the computer is on.


  • 0

Similar Topics

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users

As Featured On:

Microsoft Yahoo BBC MSN PC Magazine Washington Post HP