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2 molex cable converter to 6 pin PCIe on Radeon HD 6770

Tags:
  • Radeon
  • Cable
  • Converter
  • HD
  • Graphics
Last response: in Graphics & Displays
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August 29, 2013 4:16:14 PM

Hello, a few months back I bought a Radeon HD 6770 with the intention of upgrading my PSU, I haven't been able to save money and buy it. So I bought a cable converter like this
goo.gl/qBvubq which burned a weeks ago, it lasted for a few months. I connected one of the molex from the converter leaving one avaliable, should I've connected both cables? or how it works? I know this is pretty stupid but it's the first time I have a video card which requires a 6-Pin connector

More about : molex cable converter pin pcie radeon 6770

August 29, 2013 4:22:14 PM

the two molex to 6 pin pci-e adapters need to have both the 4 pin molex connected to the PSU or you get the issue you describe here.
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August 29, 2013 4:34:55 PM

I live in a hot country, 30-35 °C everyday, my ATI 4350 1 Gb is at 50 °C atm, playing games like dota 2 makes it reach 60 °C tho, it's a GPU with no fan cooler but a passive cooling system, I noticed after my cable burned that the converter had a max temp of 80 °C probably that's why it burned, should the GPU reach lower temps with both molex connected?
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August 29, 2013 5:01:09 PM

the reason for both the molex connectors to be used is to provide sufficient power to the GPU to operate. If the power requirements are not met the GPU will not function proper so it is possible but unlikely.

IF you connect the second wire tothe connector it will spread the load over a different set of wires and could keep the PSU cooler. Now IF your PSU is not powerful enough for the card put in it you are risking a larger fire and loss of the system and potentially the building housing it.
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August 29, 2013 5:08:32 PM

bgunner said:
the reason for both the molex connectors to be used is to provide sufficient power to the GPU to operate. If the power requirements are not met the GPU will not function proper so it is possible but unlikely.

IF you connect the second wire tothe connector it will spread the load over a different set of wires and could keep the PSU cooler. Now IF your PSU is not powerful enough for the card put in it you are risking a larger fire and loss of the system and potentially the building housing it.


it is an 600w Omega PSU (not really a certified brand) with 24A on its rail +12v, it should be enough right?
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August 29, 2013 5:27:20 PM

single rail or multi rail PSU? if it is a single rail no it is not powerful enough but if it is a multi rail there should be enough because that 24 A is on just one rail if there are more rails there will be 24A *2 or more depending on how many rails there are.

in short if it is a single rail no if multi rail yes.
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August 29, 2013 5:31:48 PM

bgunner said:
single rail or multi rail PSU? if it is a single rail no it is not powerful enough but if it is a multi rail there should be enough because that 24 A is on just one rail if there are more rails there will be 24A *2 or more depending on how many rails there are.

in short if it is a single rail no if multi rail yes.


How do I know if it is Single or Multi rail? is there any picture of my PSU that I can take and put it here so you can tell me?

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August 29, 2013 5:39:01 PM

Do you know the model number of the PSU so I can look it up. it should be on the PSU somewhere. It's an Omega (enter model number here) 600W PSU it most likely is a multi but i want to know for sure.
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August 29, 2013 5:52:27 PM

bgunner said:
Do you know the model number of the PSU so I can look it up. it should be on the PSU somewhere. It's an Omega (enter model number here) 600W PSU it most likely is a multi but i want to know for sure.


Opened the case, it says Model: ATX-600w, that chart with the rails info etc, no more than that...

..Or I'm blind.

Edit: well, it only has one +12v rail, it doesn't have any +12v2, that makes it single rail?
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