Not Really Windows 10 Per Se... Making a PCI-E 4-pn Power Connector


  1. Posts : 36
    Windows ALL
       #1

    Not Really Windows 10 Per Se... Making a PCI-E 4-pn Power Connector


    I have the parts...

    I want to make C using A and B without **ANY** possibility of frying the video card..

    I know it's likely simple, but I am talking a GTX TITAN 6GB Video Card and I don't want to have **ANY** possibility of frying it.. For reasons I don't really want to get into, buying one on Ebay or Amazon is not an option..

    Help a brother out???
    Attached Thumbnails Attached Thumbnails Not Really Windows 10 Per Se... Making a PCI-E 4-pn Power Connector-20200319_135432.jpg   Not Really Windows 10 Per Se... Making a PCI-E 4-pn Power Connector-20200319_135504.jpg   Not Really Windows 10 Per Se... Making a PCI-E 4-pn Power Connector-pci-epower-1.jpg  
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  2. sygnus21's Avatar
    Posts : 5,304
    Win 10 Pro (x64) 20H2 (19042.906)
       #2

    Those shouldn't be hard to make, but for safety reasons I'd just buy them; they aren't that expensive....


    In making them, you need to be sure of each pin location as done wrong could fry not only the card, but PC and power supply. That said, if you've got the know-how and know the pin locations than they aren't hard to make and don't necessarily require any specialized equipment other than a 5-10 dollar wire crimper.
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  3. Posts : 36
    Windows ALL
    Thread Starter
       #3

    Yea, I hear ya.. But, because of circumstances both external and internal, it would be at LEAST a week (likely 2 or more) before I can order the connector..

    Damn covid hysteria!!

    And I really want to light this puppy up..

    Figuratively speaking.. Not literally...
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  4. bobkn's Avatar
    Posts : 3,601
    Win 10 X64 Pro 20H2 19042.685
       #4

    Covid-19? How would that affect online ordering?

    However: the yellow wires are +12V, the black are grounds. That applies to both the PCI-E and Molex peripehera connectors.

    The pinouts for the PCI-E connector are:

    Not Really Windows 10 Per Se... Making a PCI-E 4-pn Power Connector-pci-e_pinouts.png

    The pinouts for the Molex peripheral connector are:

    Not Really Windows 10 Per Se... Making a PCI-E 4-pn Power Connector-molex.png
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  5. sygnus21's Avatar
    Posts : 5,304
    Win 10 Pro (x64) 20H2 (19042.906)
       #5

    I was going to post two videos, but bob beat me to the pin layout. Anyway you could see use this video as well...

    But again.... things done wrong including using cheap wire could fry your system!!! You probably want to use something like 18 gauge cable - The Math Behind GPU Power Consumption And PSUs
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  6. Posts : 36
    Windows ALL
    Thread Starter
       #6

    Thanx guys.. JUST what I needed..

    The covid comment was regards to my personal finances.. As I said.. LONG story..

    Anyways, the videos and the pinouts are JUST what I need to do this with confidence..

    Thanx again...

    - - - Updated - - -

    So, just to follow up...

    I clip the red wire off of B and run all the yellow wires from A to the single yellow wire on B and divvy up all the black wires from A onto the 2 black wires on B..

    And there shouldn't be any "load" issues or anything.. Right???
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  7. bobkn's Avatar
    Posts : 3,601
    Win 10 X64 Pro 20H2 19042.685
       #7

    Michale32086 said:
    Thanx guys.. JUST what I needed..

    The covid comment was regards to my personal finances.. As I said.. LONG story..

    Anyways, the videos and the pinouts are JUST what I need to do this with confidence..

    Thanx again...

    - - - Updated - - -

    So, just to follow up...

    I clip the red wire off of B and run all the yellow wires from A to the single yellow wire on B and divvy up all the black wires from A onto the 2 black wires on B..

    And there shouldn't be any "load" issues or anything.. Right???
    Do you plan to use two peripheral connectors per adapter? I see that the 6GB Titan uses a 6 pin PCI-E plus an 8 pin. I believe that both must be used.

    The 6 pin is rated at 75W, so a single periperhal connector could supply all the current needed. (It's rated at 11A.) The 8 pin PCI-E is rated at 150W, so you'd want to play it safe with two peripheral connectors.
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  8. Posts : 36
    Windows ALL
    Thread Starter
       #8

    The power supply in the computer has an existing 6-pn connector I can use.. So I am good there..

    When you say "The 8 pin PCI-E is rated at 150W, so you'd want to play it safe with two peripheral connectors." are you saying I should make a 2 4-pin molex connector (ala pic C) and plug BOTH into existing 4-pn connectors..

    Sorry to be so detail nitpicky, but I just want to make sure I don't fry this Titan...


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  9. bobkn's Avatar
    Posts : 3,601
    Win 10 X64 Pro 20H2 19042.685
       #9

    Michale32086 said:
    The power supply in the computer has an existing 6-pn connector I can use.. So I am good there..

    When you say "The 8 pin PCI-E is rated at 150W, so you'd want to play it safe with two peripheral connectors." are you saying I should make a 2 4-pin molex connector (ala pic C) and plug BOTH into existing 4-pn connectors..

    Sorry to be so detail nitpicky, but I just want to make sure I don't fry this Titan...


    The PCI-E adapter that you need is 8 pin, not 4.

    Yes, you'd want two use two Molex peripheral connectors to feed the PCI-E connector. There are 3 +12V pins on the PCI-E. Two would get 12V from one Molex, the third from a separate one.
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  10. sygnus21's Avatar
    Posts : 5,304
    Win 10 Pro (x64) 20H2 (19042.906)
       #10

    bobkn said:
    The 6 pin is rated at 75W, so a single periperhal connector could supply all the current needed. (It's rated at 11A.) The 8 pin PCI-E is rated at 150W, so you'd want to play it safe with two peripheral connectors.
    For all that's holy and good... please heed bob's warning above ^^^
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