How do you connect the 980 Ti Lightning?

[mucky1]

I'm new to all of this but have a pretty good grasp of it all but the 980 Ti Lightning has thrown me off.

I've ordered one but I've just seen the power connections. It has two 8 pin and one 6 pin connector on it. How do I hook this up? I'll be using a Corsair RM850 which has 3 PCI e cables with it each with an 8 pin and a 4+2 pin on it. Do I use two of these cables to hook it up?

And also I plan on getting another for SLI in a few months time. How the hell do I do that if there's only 3 cables and each one needs 2? Or is it impossible?

Probably a dumb question to some of you but I really need you to help me out here please if you get a second.

Thanks a lot.

 

[Someone Somewhere]

6+2, not 4+2.

It should work 100% fine.

 

[sizzling]

When it arrives my guess is it will all become clear how it connects, its quite simple. If you hit a problem then let us know

 

[mucky1]

6+2, not 4+2.

It should work 100% fine.

Sorry yes 6+2.

I'm really not being rude but you haven't really answered my question. I'm asking how do I set it up? Do I use 2 cables per card? And as there's only 3 cables how do I connect the second? There'd be a 6 pin connector that needs to be hooked up to the PSU.

Thanks for you help

 

[Someone Somewhere]

8-pin goes to the 8-pin. 6+2 pin becomes 6-pin, ignore the 2 pins left over, plug into the 6-pin socket.

1 cable per GPU.

 

[sizzling]

2 cables per card is preferable but with good cables a single cable with a double 6+2 will be fine. They are just splitting the current across 2 plugs but the cable can supply far greater current

 

[mucky1]

8-pin goes to the 8-pin. 6+2 pin becomes 6-pin, ignore the 2 pins left over, plug into the 6-pin socket.

1 cable per GPU.

On the Lightning it has two 8-pin connectors and one 6-pin connector though instead of the usual one 8-pin and one 6-pin?

 

[Someone Somewhere]

OH. Clearly I'm blind.

You'll need 1 1/2 cables per GPU - you can share the third cable between them. The 6+2 pins can be used as either an 8 or a 6.

The three 8-pin connectors plug into three of the 8-pin sockets. Then you use one of the 6+2-pins as an 8-pin, and the rest as 6-pins.

 

[mucky1]

OH. Clearly I'm blind.

You'll need 1 1/2 cables per GPU - you can share the third cable between them. The 6+2 pins can be used as either an 8 or a 6.

The three 8-pin connectors plug into three of the 8-pin sockets. Then you use one of the 6+2-pins as an 8-pin, and the rest as 6-pins.

Would this work?

Excuse my bad terrible drawing skills haha

 

[Someone Somewhere]

Yup, that works.

Looks like all the plugs on it are 6+2 pin.

 

[mucky1]

Yup, that works.

Looks like all the plugs on it are 6+2 pin.

Thanks for your help man. The PSU only comes with 3 cables. Am I being blind or is it difficult to find one to buy online?

 

[Someone Somewhere]

I'm not quite sure what you mean by that.

You're only using three cables; each has two plugs at the end of it.

Find one what? If you haven't bought the PSU, the RM units wouldn't be my first choice, though they're not exactly bad either.

 

[mucky1]

I'm not quite sure what you mean by that.

You're only using three cables; each has two plugs at the end of it.

Find one what? If you haven't bought the PSU, the RM units wouldn't be my first choice, though they're not exactly bad either.

Sorry yeah I forgot that it comes with three. I've not bought it yet no. Which would you recommend?

 

[Someone Somewhere]

Probably one of these: http://pcpartpicker.com/part/evga-power-supply-220g20850xr

Slightly nicer in a couple of minor ways, and basically the same price.

 

[TrailTrackers]

I'm not quite sure what you mean by that.

You're only using three cables; each has two plugs at the end of it.

Find one what? If you haven't bought the PSU, the RM units wouldn't be my first choice, though they're not exactly bad either.

Sorry yeah I forgot that it comes with three. I've not bought it yet no. Which would you recommend?

 

[TrailTrackers]

I just finished my build with 2 MSI GTX 980Ti Lightning GPUs. I also purchased the Corsair AX1500i to power the monster audio/video editing machine that I built inside the Corsair Graphite 780T case. I can tell you from recent experience with these components at least that you WILL NOT be able to connect both cards with only 3 cables. The big bag of cables that come with the AX1500i only has 2 cables that have dual 6+2 pin connectors. So with my set up at least, I used 2 cables per card. I used 1 6+2 (8) pin to connect the 1st connection point (the one closest to the back of the case), then I used the single 6+2 (8) pin connector to connect the middle connector, then I used the 2nd pig-tail of the one cable to connect the 3rd and final 6 pin connection point.
Note that my solution here pertains specifically to the parts that I purchased, and it functions beautifully. And to be crystal clear, using the components that I mention above, it took (4) total cables to connect both cards. Good luck on your build.

 

[Someone Somewhere]

That's specifically due to the way the cables on your PSU were laid out, and has zero relevance to the OP's issue.

It's also a 2 1/2 month old thread.

 

[TrailTrackers]

That's specifically due to the way the cables on your PSU were laid out, and has zero relevance to the OP's issue.

It's also a 2 1/2 month old thread.

Yeah whatever... The last thing the OP asked was for a recommendation from you as to which PSU to get and you never answered him. He also never came back and finished up his thread by indicating which PSU he ended up purchasing.

Zero relevance??? Considering my first point, I think my response has a lot of relevance here and may end up helping somebody else who reads this thread in the future by answering any possible questions concerning the components that I used.

Hmm... A 1 minute response time... That's a pretty quick beat down by a "Super Moderator". Is that how you treat all new arrivals who are just trying to be helpful? Have a great day btw.

 

[Someone Somewhere]

Yes I did. This post:

Probably one of these: http://pcpartpicker.com/part/evga-power-supply-220g20850xr

Slightly nicer in a couple of minor ways, and basically the same price.