Ugh. I need some help, because apparently I'm too stupid for this anymore. I am trying to get my 24-pin connector on my Corsair AX860i to power my ASUS P9X79 LE motherboard. I am having trouble figuring out pin 17.
A bit of background: the cables that come with the PSU are WAY to long, and drag all over on the CPU cooler and such, so I built a cable, cannibalizing the 14+10 pin Corsair PSU connector in the process. The cables been wrung out three times, and I copied the original cable pin-for-pin as I constructed the new one (removing a pin from the Corsair connector, wringing it out to the other end, then matching that wire from the new connector). The cable is right.
So, the problem. The Corsair cable ties pin 17 on the PSU (3.28V according to my DMM) to pin 24 on both the PSU and mobo (3.29V). Should be no problem. Pin 17 on the mobo is listed in the manual as "-5V," but more modern schematics list it as "NC" and that pin is empty on the mobo connector, that wire being doubled up with pin 24.
When I plug this cable into my PSU, and hit the self test button, I hear a click and the PSU won't power up. If, however, I remove pin 17 from the PSU connector (which is doubled to pin 24 at the other end), it self-tests fine, green light, fan whirring, gtg.
The original cable had (and still has, because I left the mobo connector on it when I cannibalized the PSU connector) the exact same connection, i.e. 17/24 PSU to 24 mobo. I didn't try self-testing the PSU with that one plugged in, but its the same connection.
What the hell am I doing wrong? Whats going on? Any help or insight would be appreciated. Thanks in advance.
A bit of background: the cables that come with the PSU are WAY to long, and drag all over on the CPU cooler and such, so I built a cable, cannibalizing the 14+10 pin Corsair PSU connector in the process. The cables been wrung out three times, and I copied the original cable pin-for-pin as I constructed the new one (removing a pin from the Corsair connector, wringing it out to the other end, then matching that wire from the new connector). The cable is right.
So, the problem. The Corsair cable ties pin 17 on the PSU (3.28V according to my DMM) to pin 24 on both the PSU and mobo (3.29V). Should be no problem. Pin 17 on the mobo is listed in the manual as "-5V," but more modern schematics list it as "NC" and that pin is empty on the mobo connector, that wire being doubled up with pin 24.
When I plug this cable into my PSU, and hit the self test button, I hear a click and the PSU won't power up. If, however, I remove pin 17 from the PSU connector (which is doubled to pin 24 at the other end), it self-tests fine, green light, fan whirring, gtg.
The original cable had (and still has, because I left the mobo connector on it when I cannibalized the PSU connector) the exact same connection, i.e. 17/24 PSU to 24 mobo. I didn't try self-testing the PSU with that one plugged in, but its the same connection.
What the hell am I doing wrong? Whats going on? Any help or insight would be appreciated. Thanks in advance.