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Question about 6 pins

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October 11, 2014 2:22:14 PM

My 6 pin has 2 molex extending from it and Do i need to plug in both or one, cuz everyone I know is saying one if just fine.

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October 11, 2014 2:26:33 PM

Dan2rock4 said:
My 6 pin has 2 molex extending from it and Do i need to plug in both or one, cuz everyone I know is saying one if just fine.


plug both or destroy your EVGA card
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October 11, 2014 2:29:03 PM

6 pin what ?

Aere we talking about a PCI-E / Molex Adapter ?

A 6 pin PCI-E is rated for 75 watts.... (6.25 amps)

A molex cable is rated for 11 amps (132 watts) but I doubt the outlet on the PSU is rated for that.

I wouldn't use a PCI-E / Molex adapter but if you must, I'd use both.
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October 11, 2014 3:39:35 PM

Dan2rock4 said:
My 6 pin has 2 molex extending from it and Do i need to plug in both or one, cuz everyone I know is saying one if just fine.


If you're talking about the 6-pin PCIe to 2x 4-pin Molex adapter, you must be cognizant of both the power requirements of your GPU, the power delivery capabilities of your PSU and the rail output configuration, and the existing load on those rails.

The 6-pin PCIe cable is rated to deliver 75 watts. The cable itself is not usually the limitation, it's the output from the PSU and any overcurrent protection hardware that may be present.

Each 4-pin Molex is specified to deliver at least 40 watts. A common configuration is 3 x 4-pin Molex connected together with a 4-pin FDD attached to the end. Thus, the 12 volt rail that the Molex connectors are attached to should be able to deliver at least 120 watts, usually more.

The 6-pin PCIe cable is split into two Molex connectors so that they can be attached to two separate 12 volt rails via one 4-pin Molex .

The safest bet would be to attach it to two separate Molex connectors on two separate strands.
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October 11, 2014 7:57:14 PM

Pinhedd said:
Dan2rock4 said:
My 6 pin has 2 molex extending from it and Do i need to plug in both or one, cuz everyone I know is saying one if just fine.


If you're talking about the 6-pin PCIe to 2x 4-pin Molex adapter, you must be cognizant of both the power requirements of your GPU, the power delivery capabilities of your PSU and the rail output configuration, and the existing load on those rails.

The 6-pin PCIe cable is rated to deliver 75 watts. The cable itself is not usually the limitation, it's the output from the PSU and any overcurrent protection hardware that may be present.

Each 4-pin Molex is specified to deliver at least 40 watts. A common configuration is 3 x 4-pin Molex connected together with a 4-pin FDD attached to the end. Thus, the 12 volt rail that the Molex connectors are attached to should be able to deliver at least 120 watts, usually more.

The 6-pin PCIe cable is split into two Molex connectors so that they can be attached to two separate 12 volt rails via one 4-pin Molex .

The safest bet would be to attach it to two separate Molex connectors on two separate strands.


Pretty much this, if you only plug one and you card requires more than 40W on the pcie power connector, is most likely that you'll melt the adapter and the molex connector, just like this poor soul:



Couldn't find a proper melted molex adapter, but will look pretty much like that.
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October 11, 2014 8:18:42 PM

mlga91 said:
Pinhedd said:
Dan2rock4 said:
My 6 pin has 2 molex extending from it and Do i need to plug in both or one, cuz everyone I know is saying one if just fine.


If you're talking about the 6-pin PCIe to 2x 4-pin Molex adapter, you must be cognizant of both the power requirements of your GPU, the power delivery capabilities of your PSU and the rail output configuration, and the existing load on those rails.

The 6-pin PCIe cable is rated to deliver 75 watts. The cable itself is not usually the limitation, it's the output from the PSU and any overcurrent protection hardware that may be present.

Each 4-pin Molex is specified to deliver at least 40 watts. A common configuration is 3 x 4-pin Molex connected together with a 4-pin FDD attached to the end. Thus, the 12 volt rail that the Molex connectors are attached to should be able to deliver at least 120 watts, usually more.

The 6-pin PCIe cable is split into two Molex connectors so that they can be attached to two separate 12 volt rails via one 4-pin Molex .

The safest bet would be to attach it to two separate Molex connectors on two separate strands.


Pretty much this, if you only plug one and you card requires more than 40W on the pcie power connector, is most likely that you'll melt the adapter and the molex connector, just like this poor soul:



Couldn't find a proper melted molex adapter, but will look pretty much like that.


That looks to me like a poorly formed connection. Not enough contact surface = high resistance = heat.
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October 12, 2014 12:29:08 AM

Pinhedd said:
Dan2rock4 said:
My 6 pin has 2 molex extending from it and Do i need to plug in both or one, cuz everyone I know is saying one if just fine.


If you're talking about the 6-pin PCIe to 2x 4-pin Molex adapter, you must be cognizant of both the power requirements of your GPU, the power delivery capabilities of your PSU and the rail output configuration, and the existing load on those rails.

The 6-pin PCIe cable is rated to deliver 75 watts. The cable itself is not usually the limitation, it's the output from the PSU and any overcurrent protection hardware that may be present.

Each 4-pin Molex is specified to deliver at least 40 watts. A common configuration is 3 x 4-pin Molex connected together with a 4-pin FDD attached to the end. Thus, the 12 volt rail that the Molex connectors are attached to should be able to deliver at least 120 watts, usually more.

The 6-pin PCIe cable is split into two Molex connectors so that they can be attached to two separate 12 volt rails via one 4-pin Molex .

The safest bet would be to attach it to two separate Molex connectors on two separate strands.


What happens if I connect one, my friend says if i do that i should "underclock" my graphics card but only a little bit.
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October 12, 2014 12:35:33 AM

Dan2rock4 said:
Pinhedd said:
Dan2rock4 said:
My 6 pin has 2 molex extending from it and Do i need to plug in both or one, cuz everyone I know is saying one if just fine.


If you're talking about the 6-pin PCIe to 2x 4-pin Molex adapter, you must be cognizant of both the power requirements of your GPU, the power delivery capabilities of your PSU and the rail output configuration, and the existing load on those rails.

The 6-pin PCIe cable is rated to deliver 75 watts. The cable itself is not usually the limitation, it's the output from the PSU and any overcurrent protection hardware that may be present.

Each 4-pin Molex is specified to deliver at least 40 watts. A common configuration is 3 x 4-pin Molex connected together with a 4-pin FDD attached to the end. Thus, the 12 volt rail that the Molex connectors are attached to should be able to deliver at least 120 watts, usually more.

The 6-pin PCIe cable is split into two Molex connectors so that they can be attached to two separate 12 volt rails via one 4-pin Molex .

The safest bet would be to attach it to two separate Molex connectors on two separate strands.


What happens if I connect one, my friend says if i do that i should "underclock" my graphics card but only a little bit.


If you connect only one, and it's too much for your PSU to deliver on that one rail, then it may trip the PSU's overcurrent protection mechanism which will result in power loss to prevent damage.
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October 12, 2014 1:32:41 AM

Why would you only connect one after being told you shouldn't? It's simple: If the 6-pin has two molex connectors, use two molex connectors or don't use the graphics card.
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