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How do I connect a modular PSU to a GTX 760 with 6 & 8 pin connector?

This is probably a stupid question. Long story short: I just assembled a new build, hit the power button, and my new Gigabyte GTX 760 literally started producing black smoke. It was either a faulty card, or I screwed something up. I want to make sure.

The GPU I have has 2 power connectors: a 6 pin and an 8 pin. I assume that they both have to be connected?

I have a Thermaltake 850W modular power supply. It included 2 cables (labeled PCI-E) that have a 6+2 pin connector (2 pins kinda hanging off the side). Each cable actually has 2 of those connectors daisy chained.

Thinking it would be silly to just connect the same cable twice, I used 2 separate cables, from the PSU, to the graphics card. In one port, I just plugged in the 6pin connector and left the +2 pins hanging. In the other port, I plugged in all 8.

However, this card got absolutely fried, producing smelly black smoke when I powered on. The computer (both before and after) seems fine. The PSU is brand new.

Did I connect this wrong? Should I have just used 1 of the cables from the PSU?
3 answers Last reply Best Answer
More about connect modular psu gtx 760 pin connector
  1. No, you should replace the PSU. What is the exact model of that PSU? You hooked it up right, as long as both cables are labeled PCI-E.
  2. It's this one: (Thermaltake SMART M850W)

    See those red connectors? I plugged one cable in each, then routed each one to a connector on the graphics card. I RMA'd the card, but I'm a little worried about plugging the replacement in.

    You really think the power supply is bad? Should I break out my multimeter?
  3. Best answer
    I don't like that the PCI-E cables are on the same cable, but the one review I read is fairly good. However, if you hooded it up right, and it sounds like you did, that would be the next part I'd start to suspect.
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