Mysterious Cable (coming from 20+4 pin power cable)

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elijahfite

Aug 16, 2018
2
0
20
I have a 24 pin to 20+4 pin power cable for my SST-SX650-G PSU. However, there is 4 pin cable regressing from the 20 pin side of the 20+4 pin cable end with the abbreviation “DST” on the side. Does this cable plug somewhere else on the motherboard? Back into the PSU? I really want to know what to do with this thing so I don’t damage any of my components plugging it into random stuff. Thanks!
 
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I am using the GIgabyte Gigabyte LGA1151 Intel Z170 Mini-ITX DDR4 Motherboards GA-Z170N-Gaming 5. It seems strange that a 4 pin would come from the motherboard side to route power elsewhere on the board, especially with 24 pins already online in the motherboard 24 pin input.

I am using the 650 watt version of the PSU.

Edit: everything from the psu manual and online would indicate that the extra 4 pin coming from the 20+4 pin side is not actually there in spec. This extra 4 pin is not the 4 pin that attaches to the 20 pin to create the 20+4 pin cable, it’s another 4 pin cable emerging from 4 of the 20 slot holeson the 20+4pin side of the 24pin cable.
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shmoochie

Commendable
May 10, 2018
900
4
1,715
The manuals will tell you exactly how to plug in each cable. Cross reference the psu manual with the motherboard manual. The 4 pin was added later to supply more power for pcie lanes, and you'll need it if the motherboard supports it.

What motherboard are you using?
 
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E

elijahfite

Aug 16, 2018
2
0
20
I am using the GIgabyte Gigabyte LGA1151 Intel Z170 Mini-ITX DDR4 Motherboards GA-Z170N-Gaming 5. It seems strange that a 4 pin would come from the motherboard side to route power elsewhere on the board, especially with 24 pins already online in the motherboard 24 pin input.

I am using the 650 watt version of the PSU.

Edit: everything from the psu manual and online would indicate that the extra 4 pin coming from the 20+4 pin side is not actually there in spec. This extra 4 pin is not the 4 pin that attaches to the 20 pin to create the 20+4 pin cable, it’s another 4 pin cable emerging from 4 of the 20 slot holeson the 20+4pin side of the 24pin cable.
 
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Solution
ko888

ko888

Titan
Feb 18, 2009
16,708
41
84,990
That is the Vsense (i.e. voltage sensor) cable. You connect that cable to the SENSE-4PIN connector on the PSU's modular panel. The PSU uses the detected voltages to perform voltage regulation.

Silver_Stone_SX650-_GModular_Panel_Label.jpg
 
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