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6pin to 8pin adapter

Last response: in Graphics & Displays
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December 14, 2011 9:16:15 PM

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!

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a b U Graphics card
December 14, 2011 10:09:05 PM

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?
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December 15, 2011 6:23:53 AM

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=N82E168...

Maybe there's a +2 in there I'm too stupid to see?
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a b U Graphics card
December 15, 2011 6:38:53 AM

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.
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December 15, 2011 7:15:16 AM

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-specif...

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"!!!
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a b U Graphics card
December 15, 2011 2:08:58 PM

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.
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December 15, 2011 2:45:22 PM

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?
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December 22, 2011 10:07:03 PM

Best answer selected by Stone9.
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