Graphics card power cables to PSU

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Graphics card power cables to PSU

Postby JetJaguar » Sat Apr 18, 2020 5:02 pm


I have a new (to me) GTX 1070. It came with this Y power cable:

The black end goes into the graphics card, and the two whites are female, 6-pin. My PSU has 3 modular 6-pin PCI-E ports that match the white ends.

I have ordered two PCI-E 6-pin male/male cables. I plan to use them to connect the white ends of that Y cable to two of those ports on my PSU. Will that work, or will it overpower the graphics card? Should I instead get a corresponding Y cable to go from one port of the PSU and splits into two connectors for the pictured Y cable above?

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Re: Graphics card power cables to PSU

Postby JimboPalmer » Sat Apr 18, 2020 5:19 pm

You will not over power the card. (you may draw too much power from your PSU, but generally, it would not have 3 power connectors if it could not supply them with power)
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Re: Graphics card power cables to PSU

Postby Jesse_V » Sat Apr 18, 2020 5:24 pm

I don't know how the Y cable is wired or if its wiring is compatible with your PSU ports. It would be extremely unfortunate to use a $10 cable to fry the PSU or graphics card. There's too much money on the line to risk it, it my view. Second, PSUs are usually set up to run a single line, known as a rail, from one of the PSU ports to the graphics card. Sometimes the PSU can even tell you which port to use. It's often a really good idea to use the cables and wiring instructions that come with the PSU.
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Re: Graphics card power cables to PSU

Postby lostcowboy » Tue Apr 21, 2020 8:04 pm

Hi, your power supply likely came with extra cables. You will likely find one that has an eight-pin connector, it may be split as six-pin and two-pin. you plug the two-pin part in first then the six-pin part. The six-pin locks the two-pin in place so it can't come out. That is what I am using on my RTX 2080, which works just fine.
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Re: Graphics card power cables to PSU

Postby JetJaguar » Tue Apr 21, 2020 8:40 pm

I did order a cable from Aliexpress that claims to be for my brand and model of PSU. It's 6pin on one end and 6+2 on the other. I'll plug the 6 end into one of the 6-hole -modular ports of the PSU, and the 6+2 into the card, and ignore the Y-cable.
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