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3 to 4 pin connector?

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FunkyTechnician

Member
Joined
Feb 5, 2001
Location
Baltimore
I'm using a vantec 6405OD while I'm waiting for my Swiftech fan to come in. The 3 to 4 pin connector I received is a little bit loose. Is there any reason why I can't just splice the positive and negative wires together? Or if you know a temporary fix, let me know.

Amiel
 

dimmreaper

Senior Member
Joined
Dec 16, 2000
Location
home
Forget about using those adapters.

Take the fans three pin plug. Their are three little square holes on the side of the plug. If you press a little screwdriver in those square holes the contacts and wires will come out of the plug. Take the black and redwire out using this method. Plug the plug in to the motherboard fan header, the third wire just reports fan RPM, which is nice. Now have a look at the end of the harddrive molex connector. Each molex pin is hollow, you can shove the fan wires and contacts inside of the molex pins now. Black fan wire connects to black molex wire. Red (sometimes yellow) fan wire connects to the yellow molex connector.

Congrats, the fan is running off the PSU, and you still get to keep track of the fan RPM with motherboard monitor.
 

Mr B

Senior Admin Emeritus
Joined
Dec 28, 2000
Location
East Bridgewater, MA
dimmreaper (Apr 06, 2001 06:57 p.m.):
Forget about using those adapters.

Take the fans three pin plug. Their are three little square holes on the side of the plug. If you press a little screwdriver in those square holes the contacts and wires will come out of the plug. Take the black and redwire out using this method. Plug the plug in to the motherboard fan header, the third wire just reports fan RPM, which is nice. Now have a look at the end of the harddrive molex connector. Each molex pin is hollow, you can shove the fan wires and contacts inside of the molex pins now. Black fan wire connects to black molex wire. Red (sometimes yellow) fan wire connects to the yellow molex connector.

Congrats, the fan is running off the PSU, and you still get to keep track of the fan RPM with motherboard monitor.

God bless ya, Jeff!

I've been looking for some of those 3 to 4 pin adapters locally, but with no luck. I've been holding off replacing my 80mm intake fan w/ a 92mm because I needed the adapter.

I've also been running both of the fans on the P3125 thru the mb, 'cuz they've got the 3 pin Molex plugs. Gee, I wonder how much voltage to the mb this will free up?? (I've got three fans running off the mb)

Hmmmm....any chance of a boost to the cpu?? I'd love to see a couple more FSB's.......

Thank you!

Mr B
 

dimmreaper

Senior Member
Joined
Dec 16, 2000
Location
home
Mr B (Apr 06, 2001 07:23 p.m.):
Hmmmm....any chance of a boost to the cpu?? I'd love to see a couple more FSB's.......
I've found that running fans off the PSU rather than the MoBo boostes their RPMs a wee little bit, which mean more airflow, which means lower temps. And as you say, it free's up voltage on the MoBo, but I doubt this has a dramati impact.

Just say NO to 3 to 4 pin adapters! :D
 

Mr B

Senior Admin Emeritus
Joined
Dec 28, 2000
Location
East Bridgewater, MA
Well, looks like I'll have to get a pair of 4 pin "y" connectors then....

Would be nice if it helped out the cpu...I didn't think so, but thought I'd ask anyhow.....*sigh* 1GHz is sooooo close......

Mr B
 

batboy

Senior Moment
Joined
Jan 12, 2001
Location
Kansas, USA
Mr. B, I have a drawer full of those 3 to 4 wire adapters. Email me if you want one. Careful about wiring into a 4 pin connector. Most of the 12v molex wires are yellow, not red. However, the 12v wire is usually red on the 3 pin connectors.
 

Mr B

Senior Admin Emeritus
Joined
Dec 28, 2000
Location
East Bridgewater, MA
batboy (Apr 06, 2001 10:19 p.m.):
Mr. B, I have a drawer full of those 3 to 4 wire adapters. Email me if you want one. Careful about wiring into a 4 pin connector. Most of the 12v molex wires are yellow, not red. However, the 12v wire is usually red on the 3 pin connectors.

Actually, if I use the 3 to 4 adapters, I'll need four or five of them....two for the twin fan P3125 hsf, two for the pair of hi-output 92mm case fans I got, and possibly one for the yet to be bought fan for the GPU on the vid card.

Unless, you literally have a "drawer full" of them, I'd probably be best served going with Jeffs idea, and plugging two fans each into one "Y" connector.

I'm toying w/ the idea of a full tower that will house two PSU's...one for the mobo and drives, one for the increasing number of fans in the box.....=)

Let me know how many a "drawer full" really is...like I said, I'd need a whole bunch.

Thanks for looking out, though, and again, congrats on making Senior.

Mr B
 

Mr B

Senior Admin Emeritus
Joined
Dec 28, 2000
Location
East Bridgewater, MA
Jeff,

I picked up a pair of "Y" power splitters...that tip works great!! No fans running off of the mb, and have rpm monitoring working fine.

thanks again!!

Mr B
 

XYU

Registered
Joined
Jan 3, 2001
By the way, the HD power plug has 12V between the yellow and the black wires, while the fan connector on the MoBo only gives 10V, which means connecting the fans to the HD plug will make them spin faster, which means more airflow, which means cooler CPU, GPU, or whatever.
Peace.
 

Mr B

Senior Admin Emeritus
Joined
Dec 28, 2000
Location
East Bridgewater, MA
XYU (Apr 11, 2001 03:25 p.m.):
By the way, the HD power plug has 12V between the yellow and the black wires, while the fan connector on the MoBo only gives 10V, which means connecting the fans to the HD plug will make them spin faster, which means more airflow, which means cooler CPU, GPU, or whatever.
Peace.


Wow, didn't realize that.

Hey I'm overclocking my FANS now! lol

Mr B