AMD Overclocking, MOBO will not power on.

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asador

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Oct 29, 2015
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I am relatively new to overclocking and yesterday I decided to OC my CPU a little more than I usually set it to. (4.2GHz) > (4.4GHz)

Specs:
AMD FX-8350
Kraken X61
2x Corsair 8GB
MSI 990FXA Gaming
EVGA G2 Supernova 750W Gold
MSI R9 390 8GB

I set my OC settings to the following:
■Ratio was what I was testing between 21-22.5 (I was on 22)
■Frequency was static at 200
■All other ratios were kept the same as the main cpu ratio as I was increasing.
■The voltage was set to around 1.45~1.5 (I am assuming this may be a big cause)

During the prime95 test, the temp's were quite high. I believe it was fluctuating between 59-60 C

I'm assuming temps got too high and the pc shut down to save the system.
Now my MOBO will no longer power on.

I have isolated my system to only the PSU and MOBO connected to make sure it is the MOBO or PSU.

Power is running through the PSU and the MOBO powers on for a split second then ceases.

There is no POST. (I have reviewed the stickied checklist)

Things I have tried so far:

  • ■Isolated MOBO and PSU
    ■ Restart CMOS by removing battery and shorting the power switch with screwdriver
    ■ switching/removing RAM

Any ideas on how to fix it, or is the MOBO dead?

My thoughts: With voltage set at thermal limit, and reading extensive reviews on the MSI 990FXA-Gaming. It seems to me the MOBO's capacitors were damaged from the heat/load. It seems the MOBO is more fragile than I was aware of before I started overclocking my CPU.
 
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Themastererr

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May 22, 2016
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Sounds like VRM faliaure. Put your face as close as possible to the VRM's (west and north of CPU) and take a big fat wiff. No seriously, smell your motherboard as much as possible. Do you smell any electrical burning? This would indicate a blown MOSFET, something ASUS is known for.

When you were overclocking, did you touch the Voltage rail % settings and remove the Over voltage protection? Be honest.
 
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scottfree1_01

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Oct 24, 2012
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I'd pull the cmos battery, unplug the psu and let sit over night. In the morning hit the power button a few times before plugging in just to make sure your caps are fully discharged, if it still isn't working it's most likely it's time to start shopping for a mobo..
 
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asador

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Oct 29, 2015
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I didn't change the voltage rail %. Only the voltage for the CPU. I read on various forums that the limit for my CPU was ~1.51 and I set my voltage to around 1.45-1.5

Electrical smelling? Not really? I mean I think I can smell my thermal paste. I'm not sure which is which. Smells something awful.

I did also notice a leak of some sort on the native heat sink. (Possible the capacitors blew)
 
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Themastererr

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May 22, 2016
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1.55v is AMD's safe limit

If there's no electrical smell it's unlikely you fried anything. Still, you've tried almost everything possible. A new mobo is probably in order. Sorry.

 
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scottfree1_01

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Oct 24, 2012
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"I did also notice a leak of some sort on the native heatsink. (Possibly the main reason)"

Do you know what it is? Unless you put on an after market paste that's elec. conductive (pretty rare) it's highly doubtful a manufacture would use conductive paste by default
 
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asador

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Oct 29, 2015
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Thank you for your input, I figured I might as well try RMA as the motherboard only 10 months old.
 
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asador

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Oct 29, 2015
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It is pretty much this

https://forum-en.msi.com/index.php?topic=262675.0

except I noticed it while it was still wet and no residue had formed yet.
 
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