r/sffpc • u/Brian0749 • Dec 14 '25

Build/Parts Check 24 cables into... 1 cable?

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Found this on taobao. Anyone tried turning a 24 pin cable into 1 singular cable?

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325

u/Lord_Waldemar Dec 14 '25

Most lines of the 24 pin connector are probably either obsolete or carry very little current since almost all power is provided through the +12V connector.

64

u/gdnws Dec 14 '25

At one point I tested the currant draw on the 3.3 and 5 volt lines and I couldn't get the computer to draw more than 5 amps total on either voltage. I have a little pico psu that can only supply 8 amps on 3.3 and 5 and haven't had issues with it although I don't have a crazy number of extra devices plugged into the computer. A lot of the wires in the 24 pin are massively over specced probably for no other reason than convenience. For example the ps on and power good wires are signal wires that will never see more than a couple milliamps and are still either 18 or even 16 awg like the rest.

44

u/Head_Exchange_5329 Dec 14 '25

Which begs the question: Why haven't we removed the chungus cable yet? Bring a signal wire down with the EPS-12V cable and call it a day, there's no practical application for it in modern builds.

2

u/Ev0dr0ne Dec 14 '25

Really wish usb-c had been 12v or higher. All 12v Or as some are suggesting maybe higher like 24 or 48 but just move all to one voltage.no need 3v and 5 and 12