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Thread: melted PCI-E wire

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    Default melted PCI-E wire

    I recently built a new computer, but attemtped to use my slightly older BFG 1200W EX series PSU (model BFG1200WEXPSU), my mobo, MSI MPower Z87 (with I7 4770K) had slots for two 8 pin cpu power plugs, but the PSU only had one, not sure if both had to be plugged in to run, I used a PCI-E 6+2 pin connector in one of them. When I tried to power it on, the thinner wire to the +2 pin connector on the PCI-E cable melted. Just the rubber coating melted off, the wire itself didn't come out of the connector. I now realize this was pretty stupid, but kinda assumed since the plugs fit in fine it would work ok, and mobo manual didn't have any details on what power wire went in those slots, simply said to attach power to both cpu power connectors.
    Soon as I noticed it i unplugged the wire from both board and psu (its mostly modular), but I'm not sure if I've damaged anything.. I have the computer running now with only one of the 8 pin cpu connectors plugged in, but can't find any info on weather this is safe for the board. PSU and board seem to be running fine.. but to be on the safe side I'd like to get a PSU that definitely has two 8 pin CPU power connectors, but it looks like most of them just have an 8 pin and a 4+4 pin connector. I'm not sure if a 4+4 connector is equal to an 8 pin connector. Also I'll need one with atleast 18 inch cpu wire to reach from very bottom of case (Lian Li x1000 is pretty tall) to very top of the motherboard, and I don't see the wire length spec's in the details on the PSU's i'm considering. Can anyone recommend one? Will probably need at least 1000W, 1200W to be safe.
    Have 2x 7970's to power, 2 cd drives(blu ray burner and dvd burner), 3 regular HDD's and one SSD, I7 4770K, MSI Mpower board, 2 sticks 8gb ram, 5 case fans and 2 on heatsink.

    Thanks

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    Default

    You connected a ground to a pin that expects +12v.

    I personally think it fine to run without the second 8-pin plugged in. I think the PSU has an extra 3-pin which you can stick in half of the 8-pin connector.
    Zap
    Clan of the Bloody Fist

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    One connector is OK.

    4+4 pins is indeed the same as an 8 pins connector.

    Without OC a good 650W PSU is enough, 1200W is for 4 HD7970's with OC....

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    290X cards appear o be higher draw if included in future plans.
    Anybody have good info on these?
    IE is it time to raise psu recommendations?

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    Quote Originally Posted by walterm View Post
    290X cards appear o be higher draw if included in future plans.
    Not really. Still about 300W.
    And the 290X are all thermal limited. Without a decent cooler, you can do shit...

    Quote Originally Posted by walterm View Post
    IE is it time to raise psu recommendations?
    Just with an FX9370 and 9590..

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