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Use HD 7770 without 6-Pin Connector?

I just bought an MSI HD 7770 1020MHz Video Card. The card is rated at 80W, and an PCI-E Slot can only deliver 75W.
I was wondering if I could use my card without connecting the extra power cable by downclocking it.
Is 5W really crucial for the card or it can live without it?

Is that possible without inflicting any damage to my card?

Thanks in advance! :)
15 answers Last reply Best Answer
More about 7770 connector
  1. i thing the 6 pins gone help more then downclocking th card check this on power details http://en.wikipedia.org/wiki/PCI_Express
  2. I didn't understand you very well... So is it possible or not?
  3. never try this before you could take a chance not result would please you ,the power cable give you the extra power neeeded over the 75 watts card give look at the link
  4. Best answer
    The card likely won't work at all - the fan's won't spin up or anything probably. Just get a molex 4-pin to 6-pin adapter.

    The card is designed to run on two power sources - actually it's probably designed to get most of it's power from the 6-pin - and can't just make up by drawing the extra from the other source. Put another way, you're basically asking "If my dryer needs a 220-volt line and I only have a 110, can I plug it in anyhow and just run it at half heat?"....and of course the answer is no.
  5. No they put that connector on there for a reason. It is required. If you wanted a card without the 6 pin connector you should have bought the 7750.
  6. Don't take the chance lol trust me, its more trouble than it's worth
  7. Most card's will not even power up or will display warnings if they cannot detect external power connections
  8. The card comes with a molex adapter. Just use it.
  9. Yeah it wont work at all.
  10. The problem is that I only have Two 4-pin Peripheral power connectors, and I need one for my PATA Hard Drive, but the molex adapter that came with my card need both of the connectors...

    Is there an way to use a SATA power plug for an PATA Drive?
  11. If you really don't want to use a 6-pin, I recommend this card: http://www.newegg.com/Product/Product.aspx?Item=N82E16814131449
    It's not as powerful as an HD 7770, but it is close to the 6770. You can even overclock it a little bit. Doesn't need an external power source.
  12. killzone2367 said:
    If you really don't want to use a 6-pin, I recommend this card: http://www.newegg.com/Product/Product.aspx?Item=N82E16814131449
    It's not as powerful as an HD 7770, but it is close to the 6770. You can even overclock it a little bit. Doesn't need an external power source.


    The problem is that I already bought the card and it is right here in front of me...
    I am currently using my old HD 6570, I just wanted to be sure about using an HD 7770 without its power connectors isn't an stupid idea that will make me regret for the rest of my life. :(
  13. bloc97 said:
    The problem is that I only have Two 4-pin Peripheral power connectors, and I need one for my PATA Hard Drive, but the molex adapter that came with my card need both of the connectors...

    Is there an way to use a SATA power plug for an PATA Drive?


    Buy a splitter? Hdds use only a few watts, shouldnt be a problem splitting one of the leads into two.
  14. Best answer selected by bloc97.
  15. This topic has been closed by Mousemonkey
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