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I just bought an nVidia GeForce GTX 550 Ti, which requires a 6 pin power connector, which my PSU doesn't have. However, it came with a 6-to-4 pin adapter. But when I connected the 4 pin connectors, this happened:

enter image description here

The red wire (5 V) from the adapter's connector is connected on the black wire (0 V) on the PSU's connector. Is this right?

enter image description here

  • Looks good to me, there's no way that you can put in a molex adapter backwards without breaking it and/or knowing that you dun goofed. – slow_excellence Jul 1 '14 at 16:26
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    Just to clarify: Is there only a single 4-pin connector attached? Please add a photo of the whole adapter, if possible. – Daniel B Jul 1 '14 at 17:03
  • No, two 4 pin. Photo will come soon. – GuiRitter Jul 1 '14 at 17:06
  • Here's the photo: s11.postimg.org/rkwj20jpv/2014_07_01_14_07_00.jpg slow_excellence said it's okay, but I find it really weird. So, the GPU doesn't need 5 V from that connector? – GuiRitter Jul 1 '14 at 17:11
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The 6-pin PCI-E connector on your graphic card has the following pinout

   #
 -----
|o o o|
|+   +|
 -----

where o is GND and + is +12V, see e.g. http://www.techpowerup.com/articles/overclocking/psu/116

So, no 5V line is necessary and your adapter is fine.

Check out this adapter, where the manufacturer used sensible wire colors:

enter image description here

| improve this answer | |
  • I imagined that that red couldn't be right. Thanks! – GuiRitter Jul 1 '14 at 17:30

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