EPS 4+4 cable confusion

[amir.mb]

Hi. This is my first build. I have bought corsair rm850 as my psu and some extension cable suitable for all psu. However the shape of the eps pin on the psu and extension cable were different. On the photo i attached the left side is corsair cable the right side is the extension cable from cablemod. Is this fine or will it cause any problem?

[The Flying Sloth]

Extension cable could be for GPU power, not EPS,
One of them is the GPU power thing and not CPU anyway, I don't know which is which.
I made that mistake once, but the other way around.

Sloth

[SenKa]

On the left is an EPS cable, and on the right is a PCI-E Cable.

[The_russian]

@The Flying Sloth @SenKa Are you guys sure it is a PCIe connector? If you look at a PCIe pinout, the blue pin in the photo is "rounded" while the pin in OPs photo is square, so it wouldn't fit. Also PCIe cables are 6+2 pin, not 4+4 pin.

[amir.mb]

6 minutes ago, SenKa said:

On the left is an EPS cable, and on the right is a PCI-E Cable.

I dont think on the right side is pcie. Its different shape pin with the corsair pcie. 

[amir.mb]

4 minutes ago, The_russian said:

@The Flying Sloth @SenKa Are you guys sure it is a PCIe connector? If you look at a PCIe pinout, the blue pin in the photo is "rounded" while the pin in OPs photo is square, so it wouldn't fit. Also PCIe cables are 6+2 pin, not 4+4 pin.

What do you reckon? Why the corsair and extension eps cable pin are different from each other . 

[The Flying Sloth]

6 minutes ago, The_russian said:

Are you guys sure it is a PCIe connector? If you look at a PCIe pinout, the blue pin in the photo is "rounded" while the pin in OPs photo is square, so it wouldn't fit. Also PCIe cables are 6+2 pin, not 4+4 pin.

Well, if you're right it seems I stand corrected. 
Someone made a funky cable.....

 

1 minute ago, amir.mb said:

What do you reckon? Why the corsair and extension eps cable pin are different from each other . 

They shouldn't be, like, really, there's 0 reason for them to be.

[The_russian]

10 minutes ago, amir.mb said:

What do you reckon? Why the corsair and extension eps cable pin are different from each other . 

Honestly I don't know, but as you can see from the picture, the extension cable is the one made to standard, I have no idea why the Corsair one is different. It will still fit since the corsair ones are rounded when they should be square and not the other way around, I just don't know why they are like that. 

 

Edit: If you are able to, I recommend testing the pinout with a multimeter to make sure the pinout is correct. 

[amir.mb]

4 minutes ago, The_russian said:

Honestly I don't know, but as you can see from the picture, the extension cable is the one made to standard, I have no idea why the Crosier one is different. It will still fit since the corsair ones are rounded when they should be square and not the other way around, I just don't know why they are like that. 

Oh if the extension one are standard than i guess its fine. The male eps corsair fits into the female ext eps. 

[Eschew]

Hey there. I believe both cables are EPS cables (not PCIe), just that one cable goes in the motherboard side and the other cable goes in the PSU side.

 

Comparison Images:

Spoiler

Above images show different ends of the same cable (R = Round, S = Square).

• Left: (Top Row) R, S, R, R | (Bottom Row) S, R, R, R.
• Right: (Top Row) R, S, S, R | (Bottom Row) S, R, R, S.

Source: Type 4 Sleeved Black 8-Pin (4+4) ATX12V/EPS12V Cable by CORSAIR.

 

59 minutes ago, amir.mb said:

If you compare the left cables with each other, and the right cables with each other, their pin layout seem to match.

I think that, in your photo, the cable end on the left (CORSAIR one) goes into the motherboard, while the cable end on the right (CableMod one) connects to the PSU. You could flip one cable over to do a quick comparison and see if the pin layouts match up?

Spoiler

I could also be totally 100% mistaken. PSUs aren't my forte. 

[amir.mb]

27 minutes ago, Eschew said:

Hey there. I believe both cables are EPS cables (not PCIe), just that one cable goes in the motherboard side and the other cable goes in the PSU side.

 

Comparison Images:

  Hide contents

Above images show different ends of the same cable (R = Round, S = Square).

• Left: (Top Row) R, S, R, R | (Bottom Row) S, R, R, R.
• Right: (Top Row) R, S, S, R | (Bottom Row) S, R, R, S.

Source: Type 4 Sleeved Black 8-Pin (4+4) ATX12V/EPS12V Cable by CORSAIR.

 

If you compare the left cables with each other, and the right cables with each other, their pin layout seem to match.

I think that, in your photo, the cable end on the left (CORSAIR one) goes into the motherboard, while the cable end on the right (CableMod one) connects to the PSU. You could flip one cable over to do a quick comparison and see if the pin layouts match up?

  Hide contents

I could also be totally 100% mistaken. PSUs aren't my forte. 

But the cablemods are extension cable. Whats the point buying a red extension cable if it cannot be displayed? . And @The_russian already mention that the extension cable is the standard. Only corsair made their eps cable look a bit funky. 
 

edit:

 

the pin shapes on my mobo match exactly with the cablemods extension. . 

[The_russian]

1 hour ago, Eschew said:

Hey there. I believe both cables are EPS cables (not PCIe), just that one cable goes in the motherboard side and the other cable goes in the PSU side.

 

Comparison Images:

  Hide contents

Above images show different ends of the same cable (R = Round, S = Square).

• Left: (Top Row) R, S, R, R | (Bottom Row) S, R, R, R.
• Right: (Top Row) R, S, S, R | (Bottom Row) S, R, R, S.

Source: Type 4 Sleeved Black 8-Pin (4+4) ATX12V/EPS12V Cable by CORSAIR.

 

If you compare the left cables with each other, and the right cables with each other, their pin layout seem to match.

I think that, in your photo, the cable end on the left (CORSAIR one) goes into the motherboard, while the cable end on the right (CableMod one) connects to the PSU. You could flip one cable over to do a quick comparison and see if the pin layouts match up?

  Hide contents

I could also be totally 100% mistaken. PSUs aren't my forte. 

I also thought that was a possibility at first, but that doesn't seem likely for two reasons:

1) The locking mechanism at the top of the connector. The side that goes into the PSU has one skinny locking tab thing, while the side that goes into the motherboard has 2 fatter tabs. You can see the difference in the picture you posted. 

2) The side that goes into the power supply doesn't split into two, while the side that goes into the motherboard does. 

 

Maybe @LukeSavenije can shed some light on why the corsair connector does not have a standard pinout?

[LukeSavenije]

32 minutes ago, The_russian said:

Maybe @LukeSavenije can shed some light on why the corsair connector does not have a standard pinout?

no psu connector is 1:1, unfortunately. this is why you can't use evga cables with Corsair for example. they both end in the standard way, but start different on the psu side, otherwise you'd burn through components

 

then again, this is only a problem with full cables, not with extension since they are 1:1 and extend a standard pinout

 

and yes, 4+4=eps/cpu, 6+2=pcie/gpu

[The_russian]

1 minute ago, LukeSavenije said:

no psu connector is 1:1, unfortunately. this is why you can't use evga cables with Corsair for example. they both end in the standard way, but start different on the psu side, otherwise you'd burn through components

Right but if you look at the picture, that's the side that connects to the motherboard that is keyed differently than the standard, not the side that connects to the PSU, which is why I am confused about it. 

[LukeSavenije]

36 minutes ago, The_russian said:

Right but if you look at the picture, that's the side that connects to the motherboard that is keyed differently than the standard, not the side that connects to the PSU, which is why I am confused about it. 

again, because it's not 1:1 on one side, it'll have to be done this way to meet the pinouts you see above