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  1. #1
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    Urgent help please.......

    Got what seems a major problem when connecting my Evga G2 850 watt power supply EPS12V/CPU 8 pin cable to the hero viii 4-pin/8-pin EATX12 V power plug on motherboard, the 2 x 4 connectors coming from the power supply, only one matches up with the 8 pin connector on board ? am i meant to connect only 1 then ? surely i need all the 8 pin connector connected ? Help!

  2. #2
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    Quote Originally Posted by Daytrader View Post
    Got what seems a major problem when connecting my Evga G2 850 watt power supply EPS12V/CPU 8 pin cable to the hero viii 4-pin/8-pin EATX12 V power plug on motherboard, the 2 x 4 connectors coming from the power supply, only one matches up with the 8 pin connector on board ? am i meant to connect only 1 then ? surely i need all the 8 pin connector connected ? Help!
    Hello, I have G2 750 connected to my HERO. One end has 8 pins which plugs to the PSU, the other end has 2x4 which plugs into MB, surely they both matches if you insert them correctly.

    Last edited by Desmond86; 08-19-2015 at 10:31 PM.

  3. #3
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    Thx for reply mate, yes they fit, but one of the 4 pin connectors does not match the 8 pin socket on the motherboard exactly, it still fits in as they are circle connectors and fit into the square sockets on the board, but i have since seen this on a website, and its ok to just put connector in anyway, even if its not matched up right.

    http://www.playtool.com/pages/psucon...html#eps4plus4

    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.

  4. #4
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    You got it Daytrader

    The 4+4 pin = one 8 pin cpu power cable, seems you had a hard time with yours they usually fit without issue.

    You got it to fit, all is well.

  5. #5
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    Cheers, it did fit in ok anyway, but i thought the connectors had to fit in same sort of hole like a square in a square, or circle in a circle, like one of the 4 pin connectors did, the other 4 pin was all circles, so i was looking for a all circle connector, but 2 on the 8 pin connector were square, but obviously the cirlce still fitted in, even that article said what a stupid ideal, they should just make it look exactly as what its plugging into, i guess unless you actually look you would never know, but i suffer from ocd really bad, and need things to match exactly up

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