Gigabyte GTX 1080ti power connector confusion

kubakakauko

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Jul 21, 2017
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Hey, I recently upgraded my GPU from AMD R9 290x 8GB to GTX 1080ti and me noticed an issue that confused me a lot.

So I have just received my GPU about an hour ago and without much thinking, I started taking my computer apart. I took my old graphics card out and I slid new GTX inside when I noticed that the GTX 1080 REQUIRES DIFFERENT AMOUNT OF PINS.

I don't even know how to check if 1080 will work with my old power supply :( and I'm scared to try

LINK TO MY OLD GPU: https://www.techpowerup.com/gpudb/b2843/sapphire-vapor-x-r9-290x-8-gb
POWER SUPPLY AND PINS: https://imgur.com/a/AZukkZj

Guys, I don't really know what kind of power supply I have but I know that it has 2x 6+2 pins

So I would be very happy if you could help me figure out how to plug GTX by looking at my old card's specs :)

THANKS
(Sorry for bad English)
 

jimboraver77

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Jan 6, 2018
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hi i upgraded from the 290x which used 2x 6+2 pins and also got the gigabyte 1080ti (aorus model)
my 1080ti wanted 2 x 8 pins so just plugged them all in and worked fine.

What is the exact model of your 1080ti?
also what PSU do you have ?
 

DSzymborski

Illustrious
Moderator
A GPU that works with a 290x will work with a 1080ti.

You're going to have to look at your old power supply. There are a lot of extremely horrid PSUs that have no business powering an $800 GPU that will have the correct connectors. You'll need to tell us everything you can about the PSU, whether it's telling us the brand written on it and the +12V rail or taking pictures of the whole thing or we can't answer the question.

I'm especially worried you used a power-hungry GPU and then bought an $800 GPU without knowing the PSU you have. That's the computing equivalent of taking pills from an unlabeled container that you find lying around.
 

jimboraver77

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So your old card used 1 6 pin and 1 6+2, so presumably the 1080ti wants 2x 8 pin?
so just use your 2x 6+2 pins from your psu and as long as your psu is powerful enough it should work fine :)
 

zyh1987

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Mar 16, 2018
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1080 ti should use two 8 pins, or maybe a 6 + 8 pin.

and 290x uses 2 8 pins, you want to connect one of your 6+2 pin into the 8 pin, and connect the main 6 pin (from the 6+2 pin) into the 6pin hole. you can leave the +2pin hanging on the side.
 

kubakakauko

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Jul 21, 2017
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thanks for your quick response I took a couple of pictures of the power supply and the pins but I don't think they are going to help much :(
https://imgur.com/a/AZukkZj
 

kubakakauko

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Jul 21, 2017
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Thanks for your fast response :) I took couple pictures of the hardware that you requested because I don't really know the models :(. Sorry
https://imgur.com/a/AZukkZj
 

jimboraver77

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I think im a bit confused, you have a psu With 2x 6+2 connectors and a Gfx card with 2 8pin connectors. So effectively they are the same. They only go in one way the same as on your 290x had a 6+2 to make an 8.
 

kubakakauko

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Jul 21, 2017
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On the box, it says that it needs 8pin and one 6 pins with a power greater or equal to 600w.
But just to make sure what power supply I have I sent a ticket to OverclockersUK where I got my pc built. So let's wait until they reply with the model of my PSU
 
What bothers Me more is if that's a bottom mount Psu & the case has a fan grill on the bottom it is to all intents & purposes upside,down imo.

If it were the right way round you'd clearly see the label on the side.

Exit - if you only have a pair of 6+2 cables it's a 550w model, the 650/750 have 2 pairs of connectors , 2 on each cable.
 

kubakakauko

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Jul 21, 2017
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You are correct i took turned it the other way and the sticker said that its 550 should i put GTX1080ti inside ?
 
What's the rest of your system ?

I know gigabyte state 600w But the :-* is a very good Psu & is an old precursor to modern dc-dc units (as in it can fulfil near its whole rated wattage on the 12v rail alone)

As long as you're not running 10 drives & a 150w+ cpu it'll manage absolutely fine.
 

kubakakauko

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Jul 21, 2017
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I have I7-4790k
16gb DDR3 ram
2x 2tb HDD set to RAID0
And wifi card that i can take out
 

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