making 4pin to 3pin adapter?

GenGoku · 07-19-2003, 03:30 PM

I was wondering how to make a 4pin to 3pin adapter. from what i've gathered on the net, would this be the right procedure:

4pin molex (female)
(yellow, blk, blk, red)
12v, gnd, gnd, 5v

3pin (female)
(blk, red, yellow)
gnd, 12v, rpm

do i just match up the 12v and gnd

Code:

4pin            3pin

12v¯¯¯¯¯\/¯¯¯¯¯¯gnd
gnd_____/\______12v
empty           empty
empty

the X represents the cross as 12v & gnd lines are different on the 4pin vs 3pin.

this is what i thought but a picture at svc shows different (12v --> gnd, gnd-->12v. 4pin -> 3pin)

pakman · 07-19-2003, 04:57 PM

yup, you've got it right. and if that fan has a rpm monitoring wire, just connect that to the 3rd pin on the 3pin plug.

GenGoku · 07-19-2003, 06:05 PM

is the svc pic wrong?

pakman · 07-19-2003, 06:12 PM

I think that pic is wrong. I'm looking at my 3pin connectors on my homemade 4pin->3pin adapter as well as on the 3pin fans, etc... 12v wire goes in the middle and ground goes in the side.

GenGoku · 07-19-2003, 06:43 PM

thanks for the confirmation pakman

Zogthetroll · 07-21-2003, 12:11 PM

just a word of caution, before making the adapter based off of what someone here (myself included) may tell you because of their personal pc, check the guide that came with your motherboard. the wiring may actually vary from board to board, i've got two amd systems that i'm working on right now, & the 3-pin layouts are different on the two of them.

GenGoku · 07-21-2003, 12:15 PM

Thanks for the tip. i'll have to remember that next time i use the mobo 3pin but this adapter will actually be connected to a rheobus (enermax's 6 fan + 2 display)

07-19-2003, 03:30 PM	#1
GenGoku Cooling Savant Join Date: Apr 2002 Location: Southern California Posts: 177	making 4pin to 3pin adapter? I was wondering how to make a 4pin to 3pin adapter. from what i've gathered on the net, would this be the right procedure: 4pin molex (female) (yellow, blk, blk, red) 12v, gnd, gnd, 5v 3pin (female) (blk, red, yellow) gnd, 12v, rpm do i just match up the 12v and gnd Code: 4pin 3pin 12v¯¯¯¯¯\/¯¯¯¯¯¯gnd gnd_____/\______12v empty empty empty the X represents the cross as 12v & gnd lines are different on the 4pin vs 3pin. this is what i thought but a picture at svc shows different (12v --> gnd, gnd-->12v. 4pin -> 3pin) __________________ Lian Li PC65 / Enermax Thermal Monitor + Rheobus Fioneer 4x DVD-RW (Cendyne) Eheim1250 -> DTek ProCore -> WhiteWater -> Maze4 GPU (in series) AMD XP 1700b+ @ 2.3GHz (11.5x200@1.75v actual) GeForce 4 Ti4200 128MB 512MB DDR PC3200 HyperX 512MB DDR PC3200 TwinX (2x256) Abit NF7-S v2.0 Samsung SyncMaster 900NF Powered by Water

07-19-2003, 06:05 PM	#3
GenGoku Cooling Savant Join Date: Apr 2002 Location: Southern California Posts: 177	is the svc pic wrong? __________________ Lian Li PC65 / Enermax Thermal Monitor + Rheobus Fioneer 4x DVD-RW (Cendyne) Eheim1250 -> DTek ProCore -> WhiteWater -> Maze4 GPU (in series) AMD XP 1700b+ @ 2.3GHz (11.5x200@1.75v actual) GeForce 4 Ti4200 128MB 512MB DDR PC3200 HyperX 512MB DDR PC3200 TwinX (2x256) Abit NF7-S v2.0 Samsung SyncMaster 900NF Powered by Water

07-19-2003, 06:43 PM	#5
GenGoku Cooling Savant Join Date: Apr 2002 Location: Southern California Posts: 177	thanks for the confirmation pakman __________________ Lian Li PC65 / Enermax Thermal Monitor + Rheobus Fioneer 4x DVD-RW (Cendyne) Eheim1250 -> DTek ProCore -> WhiteWater -> Maze4 GPU (in series) AMD XP 1700b+ @ 2.3GHz (11.5x200@1.75v actual) GeForce 4 Ti4200 128MB 512MB DDR PC3200 HyperX 512MB DDR PC3200 TwinX (2x256) Abit NF7-S v2.0 Samsung SyncMaster 900NF Powered by Water

07-21-2003, 12:15 PM	#7
GenGoku Cooling Savant Join Date: Apr 2002 Location: Southern California Posts: 177	Thanks for the tip. i'll have to remember that next time i use the mobo 3pin but this adapter will actually be connected to a rheobus (enermax's 6 fan + 2 display) __________________ Lian Li PC65 / Enermax Thermal Monitor + Rheobus Fioneer 4x DVD-RW (Cendyne) Eheim1250 -> DTek ProCore -> WhiteWater -> Maze4 GPU (in series) AMD XP 1700b+ @ 2.3GHz (11.5x200@1.75v actual) GeForce 4 Ti4200 128MB 512MB DDR PC3200 HyperX 512MB DDR PC3200 TwinX (2x256) Abit NF7-S v2.0 Samsung SyncMaster 900NF Powered by Water

07-19-2003, 04:57 PM	#2
pakman Cooling Neophyte Join Date: Jul 2003 Location: WA State Posts: 76	yup, you've got it right. and if that fan has a rpm monitoring wire, just connect that to the 3rd pin on the 3pin plug.

07-19-2003, 06:12 PM	#4
pakman Cooling Neophyte Join Date: Jul 2003 Location: WA State Posts: 76	I think that pic is wrong. I'm looking at my 3pin connectors on my homemade 4pin->3pin adapter as well as on the 3pin fans, etc... 12v wire goes in the middle and ground goes in the side.

07-21-2003, 12:11 PM	#6
Zogthetroll Cooling Savant Join Date: Mar 2003 Location: Ohio, U.S.A. Posts: 177	just a word of caution, before making the adapter based off of what someone here (myself included) may tell you because of their personal pc, check the guide that came with your motherboard. the wiring may actually vary from board to board, i've got two amd systems that i'm working on right now, & the 3-pin layouts are different on the two of them.

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