Need help with CPU 8 pin with mobo and psu

[randomebob]

Okay I bought a Corsair CX750M CXM series. The mobo I currently have is a Gigabyte Z97X-UD5H.

Anyways I have a 8 pin connector on my mobo, the Corsair PSU i bought has a 8 pin CPU connector as-well but.... Only half of the 4 pin matches the right side of the 4 pin mobo, I plan on using the 8 pin for overclocking. HOWEVER when I try to use the 8 pin connector it fits perfectly through the 8 pin mobo CPU connector. BUT one side of the PSU CPU connector doesn't match. There is 4 rounded pins on the PSU CPU, but on the mobo it has 2 dingle from each other rounded and 2 dingle from each other square ones. An like I said on the other half of the 4 pin it match's the other half of the 4 pin on the mobo. Can anybody please help ? Thanks much appreciated... !

 

[Tradesman1]

Can they be clipped together - have you tried them to see if they fit - not that up on Corsairs CX PSUs, I won't use them due to the weak caps thay use

 

[randomebob]

Yes i tried using the adapter for the 8 pin CPU and it worked, than i tried doing it straight to the mobo and it clipped, but like i said half of 4 pin doesnt match, so just worried to even try it

 

[Tradesman1]

Might drop Corsair an email

 

[miyakamae]

I have the same issue as well. Thanks for the suggestions.

 

[Tradesman1]

No worries, sorry not more, but have stayed away from these for a long time now

 

[randomebob]

is it okay to use the half 4 pin that does fit until I get a response, or can that damage mobo/PSU ?

 

[randomebob]

Did A little bit of research real quick and found a website.

http://www.playtool.com/pages/psuconnectors/connectors.html#atx12v4

If you scroll down 75% of the page to where it labels 4+4 pin +12 volt power cable in pure bold black, and has a picture of a 8 pin 4+4 connector. Anyways has a paragraph saying.....

Motherboards can come with either a 4 pin 12 volt connector or an 8 pin 12 volt connector. Many power supplies come with a 4+4 pin 12 volt cable which is compatible with both 4 and 8 pin motherboards. A 4+4 power cable has two separate 4 pin pieces. If you plug the two pieces of a 4+4 power cable together then you have a 8 pin power cable which can be plugged into an 8 pin 12 volt connector. If you leave the two pieces separate then you can plug one of the 4 pin pieces into a 4 pin 12 volt connector and leave the other 4 pin piece unplugged.

If you look carefully at the image above then you can see the polarization of the pins which prevents you from plugging the cable in improperly. Some of the pins are square and some of them have rounded off corners. The motherboard connectors have matching square and rounded off corners to prevent the cable from being plugged in the wrong way. But if you look really carefully at the right half of this particular cable and then look at the 8 pin 12 volt cable pictured above you'll notice that they don't match. A regular 8 pin cable has four square pins and four rounded ones but the 4+4 cable shown above has two square pins and 6 rounded ones. The left half of the 4+4 matches the left half of an 8 pin cable but the right half is different. Hmmmm... And this isn't some bizarre cable either. I've seen plenty of 4+4s which look like this one. And then there are other 4+4 cables which look just like an 8 pin cable split in two (which makes sense). Since rounded pins fit into square holes in motherboard connectors, this particular cable will fit just fine into an 8 pin 12 volt motherboard connector. But both halves of this 4+4 will fit into a 4 pin 12 volt motherboard connector. You're supposed to use the left half of the cable shown above when plugging it into a 4 pin motherboard connector but the right half will also fit. As it happens, either half will work fine in a 4 pin motherboard because both halves of the 4+4 just provide 12 volts. The pinouts are the same for both halves so either one will work. I'm not sure why they make cables like this one because you'd figure a 4+4 cable would just be an 8 pin cable which splits in two. And you only need one half of a 4+4 cable to plug into a 4 pin motherboard. The other half is unused. But the kind of 4+4 cable shown above is pretty common so don't let it throw you.