RAM in single channel mode blows power supply

February 25, 2013 at 10:40:50
Specs: Macintosh
so i'm currently in the middle of a hackintosh build due to an aging and increasingly unreliable laptop and when i have it assembled with the RAM in dual channel mode it runs just fine. However when i shut everything off and move both 8GB sticks to the same channel my power supply is blown instantly(i've gone through two corsair cx500m power supplies this way) any ideas why this may be happening this is my first build and i would love to see it to completion but i simply can't afford to keep blowing power supplies like this.

motherboard: gigabyte z77-ds3h
RAM: corsair vengeance 2x8GB sticks
CPU: intel i3 3225
PSU: corsair cx500m


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#1
February 25, 2013 at 10:48:36
As stated that doesn't seem to make sense. I would suspect some fault, a short from the sound of it, on one RAM slot. Are you sure there are no shorts between m/b and chassis and that no piece of metal has found its way into that slot? Whatever power the RAM is taking it shouldn't be enough to blow a PSU.

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#2
February 25, 2013 at 11:03:11
thanks, i'll check the holes for the standoffs in the case ( a corsair carbide 400r) dont match up as well as id like and some of the screw holes don't seem to hold the screws in so that may be causing problems

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#3
February 25, 2013 at 11:16:30
I agree with ijack. I suggest you remove the motherboard from the case and bench test it. I assume your case uses standoffs. There should be a metal standoff under every screw hole and ONLY under the screw holes.

Installing RAM modules requires some downward force. That may be causing some contact on the back side of the board.

Try ONLY on stick of RAM and try it sequentially in every RAM slot. Repeat with the second stick.

Are you sure that the power supplies are being damaged? Sounds kind of strange to me. There may be an internal fuse in the PSU.



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