Using a conversion cable for 12vATX. on mobo

Situation. Mobo has a 4 pin for 12V power. I have a psu that has 6 pins. I went to fry's and got a 4 to 4 pin cable. when i plug it in and try to test the build. Nothing happens. any suggestions????
12 answers Last reply
More about conversion cable 12vatx mobo
  1. A CPU ATX12v cable is only 4pin or 8pin, not 6pin. There are 6pin PCI-E cables though. A 4pin extension should work, unless that 4pin to 4pin was a typo.
  2. the 6 pin cable is the pci video power cable not the pci mb power cable. the pci power cable is two 4 pin cables making up an 8 pin cable. on some power supply you can take apart or snap the cable * pin in 1/2. if not it ok to just put one side of the cable into the 4 pin pci power and let the other 4 pin hang over.
  3. yes my bad. the psu pci e./hdd is 6 pinned, but on my mobo the 12v has 4 pin. any idea?
  4. USmc2010 said:
    yes my bad. the psu pci e./hdd is 6 pinned, but on my mobo the 12v has 4 pin. any idea?


    Reread what we posted? Unless you have some other problem you aren't explaining well enough for us to understand.

    Edit: also your HDD shouldn't be 6pinned... Molex is 4pins and Sata is 7/15 pins
  5. just reread. i plugged the 6 pin from the psu to the 4 pin on the mobo. I guess the other problem I am having is mobo light is green. psu works. but when I take the flat head to the 2 pwr pins it doesn't turn on/boot. nothing happens.
  6. Errr, How did you manage to do that? IIRC a 6pin and 4pin are keyed completely differently so its almost physically impossible to do that... Without a dremel or something. Can you upload pictures? Also what mobo/psu?
  7. plugged in the 6 psu pin to the 4 pins on the mobo and let 2 hang over, but now when I connect the pci 12v cord to it. the mobo just shuts off. psu is an antec 550W and mobo is an asus m5a97 le r2.0
  8. USmc2010 said:
    plugged in the 6 psu pin to the 4 pins on the mobo and let 2 hang over, but now when I connect the pci 12v cord to it. the mobo just shuts off. psu is an antec 550W and mobo is an asus m5a97 le r2.0


    Yeahhh, you've probably bricked the mobo by doing so.
  9. Even if green light stays on? and it turns on the cpu fan, and graphics card fan?. Could it be a problem w/ the psu?
  10. No, I doubt its a problem with the psu, you sent the two 12v lines into the ground socket. Not good.
  11. damn. well thank you for your input. I will be heading back to fry's. thank you again
  12. The problem is you plug the WRONG power cable into to the 4-pin cpu power port. Its very likely you have fried either the motherboard, cpu or PSU or any combination of the 3. Your power supply should have the proper connection, it should either have a 4-pin or an 8-pin cpu power connector that can be split in half to use as a 4 pin(if i had the model number of the psu I could look it up and find out for sure).
Ask a new question

Read More

Cable Motherboards