Supermicro H12SSL-i blown chip?

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RolloZ170

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Apr 24, 2016
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the U20 asmedia or the mosfet 3054 ?

looks like a switch for +12V and can be short in operation normaly.
strange package, maybe dual type.
 
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t3slanik

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Aug 22, 2026
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RolloZ170 said:
the U20 asmedia or the mosfet 3054 ?

looks like a switch for +12V and can be short in operation normaly.
strange package, maybe dual type.
Click to expand...
Was causing 10ohm to ground on the 12v cpu power supply plug. Was definitely not right. And showing excessive heat on that chip.
 
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RageBone

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Jul 11, 2017
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http://imgur.com/a/qIKKSR1

Regrettably, i suppose that chip is not supposed to be connected to 12V in any way.
From my measurments; It seems to be powered by 3.3V and creates two voltages about 1.2V and 0.6V that i associate with the DRAM.
Each bank of slots seems to have one of those.

Ergo, you seem to have a serious hardware fault that requires more debuggin then just "chip got hot".
Are you absolutely certain that chip got to see 12V or shorted out the EPS?
 
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RolloZ170

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the package is called 10VSON - seems to be a low drop voltage regulator
i hope not a texas instruments one like the tiny BMC VRMs.
 
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RageBone

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RolloZ170 said:
the package is called 10VSON - seems to be a low drop voltage regulator
i hope not a texas instruments one like the tiny BMC VRMs.
Click to expand...
I am there with you in disliking those VRs.
But i have to also wonder, there are four of them around the CPU socket.
I have to wonder why those never seem to fail.
At least i haven't encountered one in my time yet.
 
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