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Molex Power

August 26th, 2010

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What is the difference between connecting chassis fans to fan headers on the motherboard or the 4pin molex?

When you connect the fan to the header on the mobo does that supply power or do you still have to plug it in the molex connector?

The headers on the motherboard supply power. You do not need to use a
4-pin Molex power cable.

I DO suggest, however, that you Do Not use some kind of splitter, and run more than ONE fan, off of the motherboard fan power header.

If you need to split power to two fans, or more, then use a 4-pin Molex power cable adapter, that is for this.

Three pin fan connector?
One wire for power, one for ground, and one for registering the RPM's of the fan.

Four pin fan connector?
One for power, one for ground, one for RPM's, and the last one is a sensor wire. This is how the fan RPM's are sped up, or slowed down.

Find Molex Power On eBay Below:

12In Sata To Molex Lp4 Power Cable Adapter F M Sata To Lp4 Power Adapter
12In Sata To Molex Lp4 Power Cable Adapter F M Sata To Lp4 Power Adapter
$5.99
4 Pin Molex Male to 6 Pin PCI Express PCIE Female Power Adapter Cable Cordv CL
4 Pin Molex Male to 6 Pin PCI Express PCIE Female Power Adapter Cable Cordv CL
$0.74
5x 4Pin IDE Molex to 2 Serial SATA Connector Y Splitter Power Adapter Cable Cord
5x 4Pin IDE Molex to 2 Serial SATA Connector Y Splitter Power Adapter Cable Cord
$8.39
22AWG PC Cooling Fan IDE Molex 4Pin to 43pin PWM Convert Connector Power Cable
22AWG PC Cooling Fan IDE Molex 4Pin to 43pin PWM Convert Connector Power Cable
$1.93
2 pcs Dual 4 Pin Molex to 6 Pin PCIE Power Cable Adapters for NVIDIA VIDEO CARD
2 pcs Dual 4 Pin Molex to 6 Pin PCIE Power Cable Adapters for NVIDIA VIDEO CARD
$7.77
4 pcs Dual 4 Pin Molex to 6 Pin PCIE Power Cable Adapters for NVIDIA VIDEO CARD
4 pcs Dual 4 Pin Molex to 6 Pin PCIE Power Cable Adapters for NVIDIA VIDEO CARD
$12.98
6 pcs Dual 4 Pin Molex to 6 Pin PCIE Power Cable Adapters for NVIDIA VIDEO CARD
6 pcs Dual 4 Pin Molex to 6 Pin PCIE Power Cable Adapters for NVIDIA VIDEO CARD
$19.99
10 pcs Dual 4 Pin Molex to 6 Pin PCIE Power Cable Adapters for NVIDIA VIDEO CARD
10 pcs Dual 4 Pin Molex to 6 Pin PCIE Power Cable Adapters for NVIDIA VIDEO CARD
$32.99
Molex to 2 SATA Dual Power Y Splitter Adapter Cable Lead 2 Way 4 Pin to 15 Pin
Molex to 2 SATA Dual Power Y Splitter Adapter Cable Lead 2 Way 4 Pin to 15 Pin
$1.32
10 pcs Dual 4 pin Molex to 6 Pin PCIE Video Card Power Cable FOR AMD NVIDIA CARD
10 pcs Dual 4 pin Molex to 6 Pin PCIE Video Card Power Cable FOR AMD NVIDIA CARD
$23.99
5pcs 4 Pins ATX  4 Pin LP4 Molex to 8 Pins EPS Power Adapter Cable 6 15cm
5pcs 4 Pins ATX 4 Pin LP4 Molex to 8 Pins EPS Power Adapter Cable 6 15cm
$3.19
2pcs 4Pins ATX Molex Power Supply Extension Cable 1 Male to 2 Female Split Cable
2pcs 4Pins ATX Molex Power Supply Extension Cable 1 Male to 2 Female Split Cable
$1.39
4 Pin Molex to 3 Pin CPU PC Case Fan Power Splitter Cable Adapter Connector
4 Pin Molex to 3 Pin CPU PC Case Fan Power Splitter Cable Adapter Connector
$1.09
3Pcs 4 Pin IDE Molex to 15 Pin Serial ATA SATA Hard Drive Power Adapter Cable RS
3Pcs 4 Pin IDE Molex to 15 Pin Serial ATA SATA Hard Drive Power Adapter Cable RS
$1.17
2 SATA TO MOLEX POWER ADP Startech 6 Power Adapter Cord SATAPOWADAP NEW LP4
2 SATA TO MOLEX POWER ADP Startech 6 Power Adapter Cord SATAPOWADAP NEW LP4
$8.50
1PCS 16cm 8 Pin PCI Express Male To Dual LP4 4Pin Molex Power Cable Adapter
1PCS 16cm 8 Pin PCI Express Male To Dual LP4 4Pin Molex Power Cable Adapter
$0.99
8WARE Molex Power Splitter Cable 2x35F 1x525M 30cm TRC 5039 Free Ship
8WARE Molex Power Splitter Cable 2x35F 1x525M 30cm TRC 5039 Free Ship
$21.27
Genuine EVGA 4 6 PIN MOLEX PCIe Card Power Cable New W000 00 000144
Genuine EVGA 4 6 PIN MOLEX PCIe Card Power Cable New W000 00 000144
$11.00
44 Pin to 40 Pin 25 IDE Hard Drive Adapter with 2 PIN Molex Power and LED
44 Pin to 40 Pin 25 IDE Hard Drive Adapter with 2 PIN Molex Power and LED
$8.88
ATX IDE Molex Power Dual 4 To 6 Pin PCI Express PCIe Video Card Adapter Cable
ATX IDE Molex Power Dual 4 To 6 Pin PCI Express PCIe Video Card Adapter Cable
$7.52
PC Server 4 Pins IDE Molex 1 to 5 SATA Power Cable Adapter Splitter for HDD SSD
PC Server 4 Pins IDE Molex 1 to 5 SATA Power Cable Adapter Splitter for HDD SSD
$2.83
PC Server 4 Pins IDE Molex 1 to 5 SATA Power Cable Adapter Splitter for HDD SSD
PC Server 4 Pins IDE Molex 1 to 5 SATA Power Cable Adapter Splitter for HDD SSD
$3.85
Dual Molex 4 Pin to PCI E 6 Pin Power Converter Adapter Connector Cable RS
Dual Molex 4 Pin to PCI E 6 Pin Power Converter Adapter Connector Cable RS
$3.91
Molex to PCI E Power Adapter 4 Pin 6 Pin Graphics Video Card Converter Cable
Molex to PCI E Power Adapter 4 Pin 6 Pin Graphics Video Card Converter Cable
$1.70
Molex to 2 SATA Dual Power Splitter Cable Lead 2 Way 4 Pin Male to 15 Pin Female
Molex to 2 SATA Dual Power Splitter Cable Lead 2 Way 4 Pin Male to 15 Pin Female
$1.65
8 Pin PCI Express Male Plug from 4 Pin Molex LP4 Twin Plug Power Lead Cable 18cm
8 Pin PCI Express Male Plug from 4 Pin Molex LP4 Twin Plug Power Lead Cable 18cm
$2.02
15 Pin SATA Male to 4 Pin Molex Female IDE HDD Power Hard Drive Cable HDMI Hdmi
15 Pin SATA Male to 4 Pin Molex Female IDE HDD Power Hard Drive Cable HDMI Hdmi
$0.99
2x4 Pin Molex LP4 Male to 8 pin PCIe Male Twin Plugs Power Connector Cable 180W
2x4 Pin Molex LP4 Male to 8 pin PCIe Male Twin Plugs Power Connector Cable 180W
$1.78
Dual 4 Pin Molex IDE to 8 Pin PCI Express Power Cable PCI E Adapter 20 cm
Dual 4 Pin Molex IDE to 8 Pin PCI Express Power Cable PCI E Adapter 20 cm
$1.79
IDE Molex to 2 Serial SATA Y Splitter 4 Pin Hard Drive Power Adapter Cable Cord
IDE Molex to 2 Serial SATA Y Splitter 4 Pin Hard Drive Power Adapter Cable Cord
$1.56
FSP FSP250 50LA 250W Power Supply Unit 20 Pin 4 Pin 1x Berg 2x Molex IDE
FSP FSP250 50LA 250W Power Supply Unit 20 Pin 4 Pin 1x Berg 2x Molex IDE
$57.78
5x 4 Pin Molex Male to 6 Pin PCI Express Power Adapter Cable for Graphics
5x 4 Pin Molex Male to 6 Pin PCI Express Power Adapter Cable for Graphics
$3.63
New Black 680 Watt 120mm Fan Grill ATX SATA PCIe Molex 20+4 Power Supply Silent
New Black 680 Watt 120mm Fan Grill ATX SATA PCIe Molex 20+4 Power Supply Silent
$29.97
New 680 Watt ATX Power Supply PSU 20 24 Pin SATA Molex PCIE Single 12CM Fan Gold
New 680 Watt ATX Power Supply PSU 20 24 Pin SATA Molex PCIE Single 12CM Fan Gold
$29.99
680 Watt 12CM Fan w Guard Grill ATX Power Supply Unit 20 24 Pin SATA Molex Pcie
680 Watt 12CM Fan w Guard Grill ATX Power Supply Unit 20 24 Pin SATA Molex Pcie
$28.49
1 To 5 4 Pin Molex TX4 PWM CPU Cooling Fan Splitter Adapter Braided Power Cable
1 To 5 4 Pin Molex TX4 PWM CPU Cooling Fan Splitter Adapter Braided Power Cable
$1.93
4Pin Molex to 2X 15Pin Serial ATA SATA Adapter Power Cable Buy 2 Get 1 Free
4Pin Molex to 2X 15Pin Serial ATA SATA Adapter Power Cable Buy 2 Get 1 Free
$10.87
5 PCS 4Pin Molex to 2X 15Pin Serial ATA SATA HDD Adapter Power CableC 614 5PK
5 PCS 4Pin Molex to 2X 15Pin Serial ATA SATA HDD Adapter Power CableC 614 5PK
$11.29
2 PCS 4Pin Molex to 2X 15Pin Serial ATA SATA HDD Adapter Power CableC 614 2PK
2 PCS 4Pin Molex to 2X 15Pin Serial ATA SATA HDD Adapter Power CableC 614 2PK
$11.87

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