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How important is the 6-pin power cable on video cards?

Last response: in Graphics & Displays
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a b U Graphics card
August 6, 2008 10:50:41 PM

I just bought a BFG Geforce 7900GT OC 256MB PCI-e on ebay. (Please don't tell me how obsolete it is, because I got it for $26.) I just found out that it does not come with anything other then the card. The card has a place to plug in a 6-pin connector, but I'd have to go buy one separately. I know that they are sold for only $5, but I was so proud of the low price I paid for the card.

So, what would happen to the performance of the card without the 6-pin connector? Will it cause worse graphics? How important is the 6-pin power connector on a BFG Geforce 7900GT OC 256MB PCI-e Video Card?
August 6, 2008 10:57:30 PM

I'm pretty sure the card won't even run without it, so you will need that adapter.
a b U Graphics card
August 6, 2008 11:03:52 PM

Dougx1317 said:
I just bought a BFG Geforce 7900GT OC 256MB PCI-e on ebay. (Please don't tell me how obsolete it is, because I got it for $26.) I just found out that it does not come with anything other then the card. The card has a place to plug in a 6-pin connector, but I'd have to go buy one separately. I know that they are sold for only $5, but I was so proud of the low price I paid for the card.

So, what would happen to the performance of the card without the 6-pin connector? Will it cause worse graphics? How important is the 6-pin power connector on a BFG Geforce 7900GT OC 256MB PCI-e Video Card?


Without the plug, you've got a new $26 paperweight. Get the molex to 6-pin adapter.
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August 6, 2008 11:07:14 PM

haha yeah just grab an adapter. my old x800 pro wouldn't boot without it. it made a loud beeping noise. another 5 dollars for what you're getting is still really really good.
August 6, 2008 11:09:35 PM

Yeah, if the plug is given, it won't work without that connector. It's needed for the extra power. PCI-E slot can provide only 75w, PCI-E 2.0 150w , pci-e 6 pin connector 75w and pci-e 8 pin connector 150w. Depending upon how hefty is the power usage and few overclocking margins, additional power connector is given.
August 6, 2008 11:14:46 PM

If the card has a pci-e power in connector...then it needs it.
If you don't have one...skip getting the four wire to six wire adapter. Get an ATX12V 2.2, EPS12V power supply.
Anonymous
a b U Graphics card
June 1, 2010 7:47:03 PM

I'm surprised you guys so quickly assumed this misinformation. Almost all graphics cards will adapt to the lower power consumption by automatically reducing they're performance to whatever power they are supplied with.

While in the the pci-e slot without the 6 pin the card will be given a voltage of 25-75 watts.
When the 6 pin connector is plugged in it will have 75-150 watts of power. About double the capabilities.

Remember, with more power comes hotter temps and probably should just be upgraded altogether.
a c 271 U Graphics card
June 1, 2010 7:52:28 PM

Quote:
I'm surprised you guys so quickly assumed this misinformation. Almost all graphics cards will adapt to the lower power consumption by automatically reducing they're performance to whatever power they are supplied with.

While in the the pci-e slot without the 6 pin the card will be given a voltage of 25-75 watts.
When the 6 pin connector is plugged in it will have 75-150 watts of power. About double the capabilities.

Remember, with more power comes hotter temps and probably should just be upgraded altogether.

I'm surprised that you a) respond to a two year old thread and b) did not know that a 7900GT will not adapt to a low power state, it will just beep and stay in 2d mode until a 6 pin PCIe power connector is attached.
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