EVGA 1070 FTW 6pin to 8pin?

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Miltos Ser

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Hello guys,

I have a question regarding my PSU compatibility with EVGA FTW 1070.

My PSU Seasonic M12II-620 Bronze has 2 pci-e connections 1x6p and 1x8.
The EVGA FTW 1070 needs 2x 1x8 connections.

Is there a way to make it work on my PSU? Would it be safe if i make it work?

Thanks in advance.
 
It's a pretty simple deal here...last two pins are just ground. Should be amazingly difficult to screw up.

500x1000px-LL-2bf838c0_st45sf-g-modular-pinout.png
 
I bought that exact StarTech adapter linked above (but from Newegg) and it worked perfectly for a GTX 950 w/8-pin that I wanted to put into a Dell desktop that only had a single 6-pin PCIE plug.
 
Can you just plug the 6 pin into the board without the grounds? Would it work? Barring me having arcs shooting out of the video card in case something goes south that is.

I would love to get rid of my second power cable and just use the 8 pin and 6 pin that is together on one cable. Please tell me I can do this, if it's just ground, shouldn't be a big deal right?
 
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Prolly won't work, but you can certainly try. Nothing is going to break if it doesn't do the job.
 
jarablue said:
Can you just plug the 6 pin into the board without the grounds? Would it work? Barring me having arcs shooting out of the video card in case something goes south that is.

I would love to get rid of my second power cable and just use the 8 pin and 6 pin that is together on one cable. Please tell me I can do this, if it's just ground, shouldn't be a big deal right?
Click to expand...
You can try to plug the 6 pin into the card, but one of those extra grounds in the 8 pin is actually a sense wire. This means the card is going to likely detect that the 6 pin is plugged in and not an 8 pin, or not detect anything at all and refuse to work (or give you an alarm status in Windows after bootup). The StarTech adapter connects the two extra pins thus tricking the card into thinking it's a real 8 pin connector.
In your case, however, I'd continue to use the 2nd (separate) power cable to the 1070. By having two separate cables, you are splitting the power from the supply between them, thus there is less voltage drop caused by the wires. If you removed one of the cables and used both the 8-pin and 6-pin from the single remaining cable, you'd double the current being handled by those wires, thus doubling the voltage drop to the card. Would it really matter? Can't tell without analysis and testing. If you OC your video card, it could make a difference.
 
Why ship a card with connectors that can handle 375w when it doesn't even use 200w? Heree it's using less than the GTX 1080:

Review: EVGA GeForce GTX 1070 FTW Gaming ACX 3.0 - Graphics - HEXUS.net - Page 12

Lazy as fuck design by OEMs here, just to complicate installation, and claim the card has massive power handling on the spec sheet. I think you should be fine using a 6 to 8-pin adapter, since it shouldn't be drawing more than 75w on any particular channel
 
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Evga cards come with adapters in the box. So should be no problem.
 
I have used a molex splitter to a 6 pin to 8 pin adapter and it worked fine lol. If you really don't want to upgrade your power supply.
 
These 1070 use about 185W max. A pci -e 16 slot gives 75W. a 6 pin gives another 75W, 8 pin gives 150W. so you can actually get by with just 2 6pin or even 1 8pin. but it might not work if you only have 1 8 pin plug in. so you are fine with your 1 6 and 1 8 pin. you don't even need an adaptor to plug the 6 pin into the 8 pin port.
 
wildpig1234 said:
These 1070 use about 185W max. A pci -e 16 slot gives 75W. a 6 pin gives another 75W, 8 pin gives 150W. so you can actually get by with just 2 6pin or even 1 8pin. but it might not work if you only have 1 8 pin plug in. so you are fine with your 1 6 and 1 8 pin. you don't even need an adaptor to plug the 6 pin into the 8 pin port.
Click to expand...

I dont think any power is drawn from the PCIE slot, just the power connectors.
 
A lot of overly complicated answers in this thread.

Plug what you have into each 8 pin terminal on the card, and use a paperclip/wire to jump the two free terminals on the second 8 pin terminal on your 1070. This will fool the card into working.
 
could always plug what you have right now of a 6pin and 8 pin into the card. you don't need to have any adapter to plug the 6pin into the 8pin port on the card. then see if it will boot up. I have a feeling it will.
 
You'll get an error message at boot up which is why you need to either pay for an adapter, or the easier/cheaper option of just jumping the two free contacts on the card with something like a paperclip. The two extra pins are just a sense and a ground so it's perfectly safe to fool a card by doing this.
 
Mchart said:
You'll get an error message at boot up which is why you need to either pay for an adapter, or the easier/cheaper option of just jumping the two free contacts on the card with something like a paperclip. The two extra pins are just a sense and a ground so it's perfectly safe to fool a card by doing this.
Click to expand...

That sucks.
 
If my psu has 2 8 pin do I need the adaptors 4 6pin cables vs 2 8 pin
 
Lunas said:
If my psu has 2 8 pin do I need the adaptors 4 6pin cables vs 2 8 pin
Click to expand...

No PSU that I know of would have an ONLY 8 pin PCI-E connector. It would be 6+2. If it's only an 8-pin connector it may be a CPU power lead instead of a PCI-E lead..
 
Mchart said:
No PSU that I know of would have an ONLY 8 pin PCI-E connector. It would be 6+2. If it's only an 8-pin connector it may be a CPU power lead instead of a PCI-E lead..
Click to expand...
6+2 are 8 pin but yeah it has 2 6+2 unless i dig out my bag then it could have up to 4 i wanted to know if i needed to dig out 2 more to use the adaptors giving this card a total of 4 6 pin to feed 2 8 pin then i dug into it some more and no i am fine with the 2 6+2
 
Most 8 pin adapters on modern psu's are 6 pin adapters with their ground pins doubled up to a separate 2 pin ground. 6+2 pin.

There is no way in the entire world a 1070 would cause a problem with a 6 pin to 8 pin adapter.
 
Naieve said:
Most 8 pin adapters on modern psu's are 6 pin adapters with their ground pins doubled up to a separate 2 pin ground. 6+2 pin.

There is no way in the entire world a 1070 would cause a problem with a 6 pin to 8 pin adapter.
Click to expand...
the card i just got had two 6 pin to 8 pin adaptors i had the cables in my pc setup to have 2 6+2 pin cables i did not want to have to dig out the other cables and snake 2 more 6+2 in my case to hookup the 2 adaptors...
 
defaultluser said:
Why ship a card with connectors that can handle 375w when it doesn't even use 200w?
... and claim the card has massive power handling on the spec sheet.
Click to expand...

I agree on that one. The EVGA GTX 970 FTW has 6+6 and the lower priced / lower clocked EVGA GTX 970 SSC Gaming has 8+6 ...
 
defaultluser said:
Why ship a card with connectors that can handle 375w when it doesn't even use 200w? Heree it's using less than the GTX 1080:

Review: EVGA GeForce GTX 1070 FTW Gaming ACX 3.0 - Graphics - HEXUS.net - Page 12

Lazy as fuck design by OEMs here, just to complicate installation, and claim the card has massive power handling on the spec sheet. I think you should be fine using a 6 to 8-pin adapter, since it shouldn't be drawing more than 75w on any particular channel
Click to expand...

Or overkill for the sake of over clockers also it is speced to use 225w the superclocked variety is 185w the ftw are 225w and have 10 phase power
 
The picture posted earlier in this thread doesn't tell the whole story though. The difference between 6-pin and 6+2-pin pcie power cables is that a true 6-pin cable has only two live 12v pins. The extra ground and sense wires in the +2 is meant to tell the graphics card that the third 12v pin is also live.

In reality many PSU manufacturers, of good quality PSU's, just connect all three 12v pins no matter if it's a 6-pin or 6+2-pin cable. And/or the wires are overdimensioned so even if it only has two you can still pull 150W without melting the cable (which enough people have ended up doing using molex adapters).
 
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