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question about modifying cpu pin adapters

post #1 of 4
Thread Starter 
I finally got my motherboard today and I started putting the computer together, and something I noticed is that my motherboard has absolutely no 3 pin cpu connectors?

I have a Gigabyte GA-H55M-USB3 LGA 1156 motherboard and it comes with only two 4 pin fan headers.

I have a total of two 3 pin connectors that require power

---Top 140mm fan I cut/spliced/heatshrinked the wiring to allow it to connect to my power supply and run at full speed.

---Side case fan already connects to my power supply to run at full speed with no modifications required

--Front hard drive fan is a 3 pin and no more 3 pin headers are available, but id like to "Y" this into the 140mm fan wiring and create a sort of harness
and have both of them connected to the power supply to run at full speed.

Last is the Corsair pump itself which requires a 3 pin header to operate, and I was thinking of "Y"ing the H50 wires with the side fan wiring, so that both the side fan, and the H50 pump will receive 12 volts from the power supply.

I know its possible, but I have no idea if this is safe or not. I dont know if the H50 uses a constant 12 volts for the pump or if there would be any amperage issues.

Sorry if this is confusing lol anybody with advise, id greatly appreciate it smile.gif
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Current Build
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i3 Gigabyte GA-H55M USB3 Gigabyte nVidia 9800GT G.skill ripjaws DDR3 8gb 1600 
Hard DriveOSMonitorKeyboard
Samsung Spinpoint 500gb Ubuntu 10.04 and Windows 7 Samsung 24'' LCD TV/Monitor Adesso keyboard /w built in touch pad 
PowerCase
Antec Earthwatts 750 watt NZXT M59 
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post #2 of 4
Splicing into the the 12V rail from the power supply should be fine and you shouldn't have any power issues if wired correctly. Also, 3 pin CPU connectors can fit into 4 pin connectors because the last pin is the PWM pin for speed control and 3 pin fans do not have that, so it is simply not plugged in. The 4 pin connectors are still keyed for 3 pin. I would not splice the H50 and it's fan so it will be easier to remove and replace if you ever decide to without voiding the warranty.
Tiny Fun
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i7-4770K @ 4.0GHz MSI Z87I EVGA GTX 660 Ti Corsair Vengeance 16GB 
Hard DriveCoolingOSCase
Samsung 840 Pro 256GB Swiftech Apogee Drive II Windows 8 Enterprise x64 Cooler Master Elite 120 Advanced 
CPUCPUCPUCPU
AMD Opteron 6274 ES 2.2GHz 16-Core AMD Opteron 6274 ES 2.2GHz 16-Core AMD Opteron 6274 ES 2.2GHz 16-Core AMD Opteron 6274 ES 2.2GHz 16-Core 
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CPUCPUCPUCPU
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Tiny Fun
(8 items)
 
4P Folding Rig 1
(16 items)
 
4P Folding Rig 2
(11 items)
 
CPUMotherboardGraphicsRAM
i7-4770K @ 4.0GHz MSI Z87I EVGA GTX 660 Ti Corsair Vengeance 16GB 
Hard DriveCoolingOSCase
Samsung 840 Pro 256GB Swiftech Apogee Drive II Windows 8 Enterprise x64 Cooler Master Elite 120 Advanced 
CPUCPUCPUCPU
AMD Opteron 6274 ES 2.2GHz 16-Core AMD Opteron 6274 ES 2.2GHz 16-Core AMD Opteron 6274 ES 2.2GHz 16-Core AMD Opteron 6274 ES 2.2GHz 16-Core 
MotherboardGraphicsRAMHard Drive
SuperMicro H8QGi+-F Matrox G200eW 16x2 (32GB) Crucial Ballistix DDR3 1600MHz Crucial C300 64GB 
OSPowerCase
Linux Mint 15 Cinnamon 64-bit Enermax Galaxy Evo 1250W Spotswood Tech Tray 
CPUCPUCPUCPU
AMD Opteron 6176 SE 12-Core 2.3GHz AMD Opteron 6176 SE 12-Core 2.3GHz AMD Opteron 6176 SE 12-Core 2.3GHz AMD Opteron 6176 SE 12-Core 2.3GHz 
MotherboardGraphicsRAMHard Drive
Supermicro H8QGL-IF+ Matrox G200eW Kingston Server 16x1GB DDR3 Corsair Nova 32GB 
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post #3 of 4
I would hardwire directly the H50 to a molex connector or the PSU due to reliability concerns. This a pretty expensive piece of hardware and if it were Y-ed to a fan, and that fan would short/brake, it may take the pump along with it.

The pump draws 2.4W, so not a whole lot. Any Molex connector can supply that amount of power, so you don't really need to hardwire the pump to the PSU. Another advantage of using a Molex-to-3pin adapter is the Molex cable probably is protected against short-circuits, while wiring the pump directly in the PSU may bypass this protection.
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post #4 of 4
Thread Starter 
Quote:
Originally Posted by dragosmp;12174024 
I would hardwire directly the H50 to a molex connector or the PSU due to reliability concerns. This a pretty expensive piece of hardware and if it were Y-ed to a fan, and that fan would short/brake, it may take the pump along with it.

true! I decided to buy a new connection for the psu that will split 3 pin sockets and that should solve this problem. finally got everything up and running. looks very sloppy right now, still need to zip tie the wiring, put the side panel on, hook up the remaining 3 case fans, and spray paint the dvd drive front cover with a glossy black to match the case so it looks like it actually belongs there lol
Current Build
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CPUMotherboardGraphicsRAM
Intel Core i3 Gigabyte GA-H55M USB3 Gigabyte nVidia 9800GT G.skill ripjaws DDR3 8gb 1600 
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PowerCase
Antec Earthwatts 750 watt NZXT M59 
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Current Build
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i3 Gigabyte GA-H55M USB3 Gigabyte nVidia 9800GT G.skill ripjaws DDR3 8gb 1600 
Hard DriveOSMonitorKeyboard
Samsung Spinpoint 500gb Ubuntu 10.04 and Windows 7 Samsung 24'' LCD TV/Monitor Adesso keyboard /w built in touch pad 
PowerCase
Antec Earthwatts 750 watt NZXT M59 
  hide details  
Reply
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