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6pin to 8pin adapter

I'm hoping to purchase a GTX570 soon, but many require a 6 and 8 pin connector. My 650W PSU only has two 6 pin connectors. Is it okay to use a 6pin to 8pin adapter? Will the card be expecting more power from the 8 pin cord? Will the card try to pull too much power through the adapted 6pin cord? I'm pretty oblivious to how that all works.

Thanks in advance guys!
10 answers Last reply Best Answer
More about 6pin 8pin adapter
  1. The 8 pin is a 150watt connection and the 6 is 75watt. Regardless of that usually the 6 to 8pin adapter is safe to use but here is more info on it http://www.playtool.com/pages/psuconnectors/connectors.html#peripheral
  2. Best answer
    There's an article up on the main page that briefly goes into this. From that, I'd say you'd probably be ok, as even though a 6-pin is only 75W, the wires can carry more power than that. But I'm a little concerned that a 650W PSU doesn't include 2x6+2 connectors. It might not put out enough 12v amps. What model do you have?
  3. Solution: There are GTX 570 cards only requiring two 6 pin connectors: http://www.gigabyte.co.nz/products/product-page.aspx?pid=3955#ov
    Buy one of those to be safe
  4. hapkido said:
    There's an article up on the main page that briefly goes into this. From that, I'd say you'd probably be ok, as even though a 6-pin is only 75W, the wires can carry more power than that. But I'm a little concerned that a 650W PSU doesn't include 2x6+2 connectors. It might not put out enough 12v amps. What model do you have?


    It's a BFG bfgr650psu

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817702003

    Maybe there's a +2 in there I'm too stupid to see?
  5. If I don't go that Gigabyte route (looks like it got some good reviews), would a molex to 8 pin adapter work better than a 6pin to 8pin in order to assure the card is getting the full power it needs?

    http://www.frys.com/product/6608974

    http://www.amazon.com/Express-6-Pin-4-Pin-Manhattan-378314/dp/B001CSCETO
  6. Stone9 said:
    I'm hoping to purchase a GTX570 soon, but many require a 6 and 8 pin connector. My 650W PSU only has two 6 pin connectors. Is it okay to use a 6pin to 8pin adapter? Will the card be expecting more power from the 8 pin cord? Will the card try to pull too much power through the adapted 6pin cord? I'm pretty oblivious to how that all works.

    Thanks in advance guys!

    As long as your power supply is of decent quality you will be fine I ran CFX Radeon HD 4890s (Power Hog Edition cards) off one 550watt Toms Hardware certified Enermax PSU using Molex to 6 pin dongle adapters and it ran fine for the whole year of ownership 24/7.
  7. It appears that even plugging a 6pin into an 8pin is OK, at least according to the PSU guide on Tom's Hardware...

    http://www.tomshardware.com/reviews/power-supply-specifications-atx-reference,3061-12.html

    It states "Because of both the physical design as well as the use of the sense signals, the six-pin power supply connector plug is backward compatible with the eight-pin graphics card socket. This means that if your graphics card has an eight-pin socket but your power supply has only six-pin connectors available, you can plug the six-pin connector into the eight-pin socket using an offset arrangement, as shown below. The connectors are keyed such that they should only plug in the correct way, but be careful because they can be forced together in an incorrect fashion, which can potentially damage the card."

    However, it says an 8 pin cannot be plugged into a 6 pin.

    Thanks for the advise guys. I'll probably pick up that Gigabyte one or an ASUS one. The question is now... can I fit the 11"+ cards into my Antec Solo case. From my measurements right now... it looks like I'll need to max out at 10.5"!!!
  8. You just answered your own question. An 11" card won't fit in a 10.5" space. Another thing to keep in mind is whether or not the card has power connectors on the top or back. If they're on the back, you'll need additional space.
  9. Haha, yeah I did! I said that because I'm contemplating removing my HDD cage, but the more I look at it I just don't think I'll do it... EVGA has a bunch of 9" sized 570's. Possible I might try those, or just nut up and buy the Corsair 650D I've been eyeing for so long. Good excuse to buy a new case right?
  10. Best answer selected by Stone9.
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