new system shuts on and off repeatedly

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rtil

rtil

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Jul 4, 2010
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Hello, thank you for anyone reading this. I am extremely desperate to get my system back up and running and i'm at my wits' end.

recently I needed some new parts. I have:
Corsair AX860i PSU
Intel i7 3770k
EVGA GTX 660Ti
8gb gskill ddr3 (x4)

I breadboarded this on my new Asus Sabertooth Z77 with one stick of ram. Worked fine. Then I put it into my case, plugged in the extra following: the other 3 ram sticks, 5 SATA (4 HD's and a front panel SATA), front panel audio and 2 USB 2.0 slot. Then I pressed power, comes on for about half a second, turns off. Keeps doing this.

So i think it might be a short or grounding issue. I breadboard it again like i had it last time. still doing the same thing.

I exchanged the motherboard for a new one today. Tried this all again. Now I have the same problem. A motherboard that will only power on for about half a second.

Its green standby power light does come on. I have tried clearing CMOS.

I have no idea what to do anymore.

Can some SATA , USB2.0 and front panel audio connections seriously be the culprit? Or a bad RAM stick that was fine a few days ago? Can any of these seriously brick a new motherboard? What am I doing wrong?

edit: i should also mention that i tried this with another PSU and got the same result.

Thank you for any help.
 
Solution
JMer806


A bad RAM stick shouldn't hurt the MOBO, unless it had some physical defect that broke a connector, or something. I wouldn't worry about that.
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JMer806

JMer806

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Jun 12, 2012
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If you have a different power supply, check that. The AXi series is really superlative quality, but even there sometimes there are lemons.

However, this sounds more like an issue with your RAM since you only breadboarded with one stick when it worked. Test it using each of your sticks, one at a time. Perhaps that's your issue.
 
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rtil

rtil

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Jul 4, 2010
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I will do that next time to be safe.

I know it is not the PSU though because I have two with me and they both are consistent in my findings.

If a RAM stick was bad though, i don't think it could brick a mobo? I'm going to put everything in one at a time and see if I can pinpoint the problem.
 
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JMer806

JMer806

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Jun 12, 2012
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A bad RAM stick shouldn't hurt the MOBO, unless it had some physical defect that broke a connector, or something. I wouldn't worry about that.
 
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Solution
rtil

rtil

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Jul 4, 2010
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turns out i was doing something that corsair told me not to do but i did it anyways - plug a cable into the PSU that didn't come with the PSU. it's this 6-pin fan connector that came with my case. it was making the PSU turn on and off very quickly and bricking mobos by doing so.

it was 100% my fault for doing this as i clearly read these instructions yet ignored them. a new mobo and not plugging in that 6-pin on the modular PSU solved the problem.
 
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