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EVGA GTX 660 Ti to a Corsair AX860i PSU

Tags:
  • EVGA
  • Power Supplies
  • Intel
  • Cable
  • PCI Express
  • Corsair
  • Graphics
  • Gtx
  • Graphics Cards
Last response: in Graphics & Displays
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May 15, 2013 9:39:32 PM

So, I'm trying to use what cables came with my PSU to put my new system together, but the Corsair PSU came with a bunch of 6+2 PCI-E cables, and the EVGA uses 2 6-pin connectors. A normal 6-pin connector (including those shown in the EVGA connection diagrams) is really only using 5 pins...one spot, center top, is empty. All of the 6+2 PCI-E connectors are utilizing all 6 pins, +obviously the extra 2 (which are seperate on my cables). If I plug the 8-pin end into the PSU, and the two 6-pin ends into the GTX, is stuff going to fry? Am I stuck buying 2 more regular PCI-E 6-pin cables for this thing? Or a 6-pin to split double 6-pin cable, and using the "Peripheral + SATA" plugs on the PSU as opposed to the "6+2 PCI-E & 4+4 CPU" plugs? Thanks in advance.

More about : evga gtx 660 corsair ax860i psu

a c 134 ) Power supply
a b å Intel
a c 172 U Graphics card
May 15, 2013 9:47:17 PM

I'm having a hard time following you. If I understand your issue correctly, you can plug either a 6-pin or a (6+2)-pin PCIe power connector into either slot on the card, but you must use both PCIe power connector on the GPU. If you're using a (6+2)-pin PCIe power connector, you can leave the ending two dangling off to the side.
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May 15, 2013 9:54:25 PM

ksham said:
I'm having a hard time following you. If I understand your issue correctly, you can plug either a 6-pin or a (6+2)-pin PCIe power connector into either slot on the card, but you must use both PCIe power connector on the GPU. If you're using a (6+2)-pin PCIe power connector, you can leave the ending two dangling off to the side.


The GTX 660 Ti will ONLY take a basic 6-pin PCI-E connector, in which there are really only 5 pins/wires for some reason. The cables that came with my PSU, however, have 6 wires into the connector, and the 2 extra that would be dangling off the side, but have an 8-pin connector that goes into the PSU (where, oddly, 2 of the wires that are the "extra" plug on the 6+2 end run to one pin at the PSU).

Basically, I'm worried that the connectors aren't compatible. I worry that connecting all 6 wires on the 6+2 connector into the card (as opposed to a "normal" 6-pin PCI-E cable) will damage it in some way. And, yeah, I'm probably explaining this poorly.

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a b ) Power supply
a b U Graphics card
May 15, 2013 9:58:45 PM

your fine it will not hurt anything the extra wire just adds extra current for the +2 if it is needed. It will not fry anything. My PSU is the same way.

EDIT: Better explanation = the reason for the extra 2 wires (at PSU) is because if the +2 came off just 2 wire the current draw could cause the wire to melt or have a catastrophic failure. (FIRE) The extra wires allow for the +2 to draw its power from another set of wires so it evens out the power draw over 4 wires total not just 2. effectively at the card (if the +2 was needed) the far right 4 pins have 4 wires to draw off of, if there were only 2, you would have 4 plugs drawing from 2 wires.

PSU's Put out DC current not AC so adding a wire does not double the voltage like it would in a house hold environment. Adding the wire effectively thickens the wire gauge so it can carry more amps if needed before failure.
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a c 134 ) Power supply
a b å Intel
a c 172 U Graphics card
May 15, 2013 10:01:12 PM

Yes; they're compatible. The (6+2)-pin PCIe power connectors are designed to be dual-purpose. It can function as both a 8-pin PCIe power connector or a 6-pin PCIe power connector by leaving off the last 2 pins. The power supply will only draw as much power as required for your card to run. It won't draw more or less so it's not going to cause your GPU to explode by drawing more than it needs.
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May 15, 2013 10:02:07 PM

Awesome. Thank you. As a quick follow up, will it hurt anything to cut those "+2" wires off and shrinkwrap/sleeve the cable? It would look a lot nicer.
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a b ) Power supply
a b U Graphics card
May 15, 2013 10:05:05 PM

I'm guessing you actually have a GTX 660 Ti model and not just the vanilla GTX 660 (no Ti), which actually requires 2 x PCI-e power connectors. Just plug in the 6 pin portion only into the GPU x 2 and you should be just fine.



^^^ Just look at the picture above of a 6 + 2 pin PCI-e power connector. Just use the 6 pin portion.
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May 15, 2013 10:07:39 PM

lunyone said:
I'm guessing you actually have a GTX 660 Ti model and not just the vanilla GTX 660 (no Ti), which actually requires 2 x PCI-e power connectors. Just plug in the 6 pin portion only into the GPU x 2 and you should be just fine.




^^^ Just look at the picture above of a 6 + 2 pin PCI-e power connector. Just use the 6 pin portion.


Yeah, what has/had me worried is that a "normal" 6-pin connector really only has 5 pins:

http://images.anandtech.com/reviews/shows/computex/2004...

Didn't want something incompatible blowing up a GPU.
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a c 134 ) Power supply
a b å Intel
a c 172 U Graphics card
May 15, 2013 10:09:27 PM

Kagetora said:
Awesome. Thank you. As a quick follow up, will it hurt anything to cut those "+2" wires off and shrinkwrap/sleeve the cable? It would look a lot nicer.

You can cut it, but I would HIGHLY recommend that you don't. If you cut them, you better know how to safely secure it or bad things will happen. Do it at your own risk.
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a b ) Power supply
a b U Graphics card
May 15, 2013 10:14:37 PM

ksham said:
Kagetora said:
Awesome. Thank you. As a quick follow up, will it hurt anything to cut those "+2" wires off and shrinkwrap/sleeve the cable? It would look a lot nicer.

You can cut it, but I would HIGHLY recommend that you don't. If you cut them, you better know how to safely secure it or bad things will happen. Do it at your own risk.


DO NOT cut the power cables unless you know what your doing like he said!

I have that power supply and you will need to plug in the 6+2. You will have those extra pins hanging off, but it is fine.
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a b ) Power supply
a b U Graphics card
May 15, 2013 10:15:21 PM

If you cut them then 2 bad things can happen.

1 fire!!!
2 when you get a different GPU and it has a need for an 8 pin then you wont have them.

don't cut them, use a small wire tie and tie it to the rest of them. whether it be to the 6 pin or fold it back and tie it to the wire its self. it won't hurt anything.
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May 15, 2013 10:16:40 PM

ksham said:
Kagetora said:
Awesome. Thank you. As a quick follow up, will it hurt anything to cut those "+2" wires off and shrinkwrap/sleeve the cable? It would look a lot nicer.

You can cut it, but I would HIGHLY recommend that you don't. If you cut them, you better know how to safely secure it or bad things will happen. Do it at your own risk.


Hehehe. Yeah, I imagine. I used to be an electronics tech, so I think I can do it...but on the bright side, I don't have to. I found my tool kit, and was able to remove the "+2" cable entirely from the PSU connector. Its just an empty slot now. Much better than cutting the wires.
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a b ) Power supply
a b U Graphics card
May 15, 2013 10:18:26 PM

Kagetora said:
ksham said:
Kagetora said:
Awesome. Thank you. As a quick follow up, will it hurt anything to cut those "+2" wires off and shrinkwrap/sleeve the cable? It would look a lot nicer.

You can cut it, but I would HIGHLY recommend that you don't. If you cut them, you better know how to safely secure it or bad things will happen. Do it at your own risk.


Hehehe. Yeah, I imagine. I used to be an electronics tech, so I think I can do it...but on the bright side, I don't have to. I found my tool kit, and was able to remove the "+2" cable entirely from the PSU connector. Its just an empty slot now. Much better than cutting the wires.


That's good to know. It's scary to think someone might do that and something go seriously wrong.
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a b ) Power supply
a b U Graphics card
May 15, 2013 10:22:58 PM

edogawa said:
Kagetora said:
ksham said:
Kagetora said:
Awesome. Thank you. As a quick follow up, will it hurt anything to cut those "+2" wires off and shrinkwrap/sleeve the cable? It would look a lot nicer.

You can cut it, but I would HIGHLY recommend that you don't. If you cut them, you better know how to safely secure it or bad things will happen. Do it at your own risk.


Hehehe. Yeah, I imagine. I used to be an electronics tech, so I think I can do it...but on the bright side, I don't have to. I found my tool kit, and was able to remove the "+2" cable entirely from the PSU connector. Its just an empty slot now. Much better than cutting the wires.


That's good to know. It's scary to think someone might do that and something go seriously wrong.


I have seen people do way worse things and call it safe. "Scary" is a mild term for it.
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a b ) Power supply
a b U Graphics card
May 15, 2013 10:28:36 PM

Does seeing someone handle a powered on motherboard or sticking a screw driver into power supply count as scary to you? -.-
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a b ) Power supply
a b U Graphics card
May 15, 2013 10:35:36 PM

the power supply depends on if its plugged in. if not then I have done it when I tor my old one down and painted the case but plugged in or ON its just asking for the need for defibrillators.
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a b ) Power supply
a b U Graphics card
May 15, 2013 10:38:08 PM

Powered on...I swear to god the stuff some people do...

Anyways, since the OP problem is solved he should give one of the guys above best answerer.
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May 15, 2013 10:40:22 PM

I really appreciate the help! Been 7+ years since I built my last machine, and a lot has changed...particularly the cables, it seems like. Thanks, all.
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a c 134 ) Power supply
a b å Intel
a c 172 U Graphics card
May 15, 2013 10:49:59 PM

You're welcome. :) 
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