GPU has 2 6 pin connectors, PSU only has 6+2 cables

Varun916 · Mar 8, 2016

The problem is they didn't give me enough cables to run 2 graphics cards. I have 3 6+2 connectors. The psu is more than good for running two high end gpus: http://www.amazon.com/gp/product/B00K85X23O?psc=1&redirect=true&ref_=oh_aui_detailpage_o08_s00

The 2 pin connector has a stub on it that prevents me from inserting it into a 6 pin slot. Can I just cut that stub off and connect each 6+2's extra 2 pin connectors into the last 6 pin slot? IE 3 6+2 cables = 3 6 pin slots filled, with the remaining 2+2+2 filling the last 6 pin slot.

Darkbreeze · Mar 8, 2016

Sure you can do that, if you want to see sparks and a nice pile of molten plastic where your system used to sit. Don't do it or try it. That's the worst idea I've heard, today anyhow. It won't work anyhow and will 100% cause a fire.

I wouldn't use the EVGA B1 series for a single discreet card much less for two. That's bad form for sure. Any power supply intended or capable of running dual high end graphics cards requiring four six pin or eight pin connectors, would come with them. If it doesn't have them, it shouldn't be used for it. Why they include 3 6+2 cables I don't know, as it it's an oddball number that makes no sense to me. I can't envision any use for a third set of 6+2 cables if two are in use on one card. There are no cards that I know of which require three 6 or 8 pin connections, so it's kind of silly.

If you just bought this PSU, I'd return it if possible and get something more reliable and capable. The EVGA B2 series is a very good unit. The B1 NEX units are really not. And they are especially not when we're talking dual cards. No way that unit will hold up longer than six or eight months, if that.

Some will tell you to just use 4 pin Molex to 6 pin adapters, but I highly recommend against doing that, for the reasons I've already outlined and further because it's not how the 12v molex circuit was intended to be used. I've seen fires happen using Molex on graphics cards with too much draw.

Find a good tier 1 or 2 unit as listed at the following link, that DOES have the necessary connectors.

http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html

Varun916 · Mar 9, 2016

Thanks darkbreeze- I did buy it recently so I'll be returning. It has numerous positive reviews on amazon & is bronze 80+ rated so I thought it'd do the job, given that it has 750 W. It seems to me that each pair of pins should be + & -, each capable of carrying some total wattage. I feel like there should be no question as to the load a psu can handle if its rated total power output is greater than the draw...

Darkbreeze · Mar 9, 2016

You have a lot to learn about power supplies, and it's a good thing to know a lot about because nothing in your system is as important as the power supply. If the power supply doesn't work, or doesn't work right/well, then nothing does.

Reading all the way through that power supply thread is a good place to learn a lot, but no specifics really aside from the tiers themselves. Here are some good reads linked below to help you understand the importance of the power supply. And just for future reference, don't ever believe what you read in any reviews on Amazon or Newegg. Most those idiots give a positive review for anything that turns on, yet give bad reviews for failures they themselves have caused. There are tens to hundreds of articles focused strictly on how unreliable vendor site reviews are. If you want a review of something, find and read a professional review.

Any hardware worth it's weight will have one. If there is no review to be found for just about any piece of hardware that exists, it's either because it's too old, too new or was not worth reviewing because it was that bad and even the manufacturer didn't want to send any samples to the review sites for fear of bad publicity.

If it's a power supply and there is no professional review for it on either Tom's Hardware, JonnyGuru, HardOCP or Hardwaresecrets, then it's probably either very new or it's a lower quality unit not worth using.

Also, don't always believe what you see on the label and the product marketing descriptions. Manufacturers are well known for using liar labels, misrepresenting capabilities or creatively listing specifications in ways that are not the industry standard, like this for example.

http://www.hardwaresecrets.com/power-supplies-with-fake-80-plus-badges/

This is an interesting video that outlines why you shouldn't buy a cheap power supply, in depth, but in way you can understand.

https://www.youtube.com/watch?v=uRBu5egS6Ig

And these are all good reads:

http://www.tomshardware.com/reviews/low-cost-psu-pc-power-supply,2862.html

http://www.tomshardware.com/reviews/power-supply-psu-review,2916.html

And this is what happens when you use a cheap power supply to do what you want to do, which is run two cards off it:

http://www.tomshardware.com/answers/id-2616365/blew-psu.html

Varun916 · Mar 9, 2016

Thanks a lot!

Darkbreeze · Mar 9, 2016

Anytime at all.

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GPU has 2 6 pin connectors, PSU only has 6+2 cables

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