Author Topic: PC CPU resistance.  (Read 430 times)

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Offline ktuluTopic starter

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PC CPU resistance.
« on: November 01, 2024, 09:40:39 am »
I have a Gigabyte GA-H61MA-D3V rev2.0 motherboard and an i5-3470 CPU. The board keeps restarting every few seconds. The CPU barely gets warm for that short period of time. (pulsating)
However the board work fine with a G530 CPU. It has the latest BIOS flashed. F7c
I've measured the tiny caps on the underside of both CPU's.
The i5 measures very low, 0.8-1 Ohms while the other I get around 30 Ohms.
I need some help if somebody still has this CPU (i5-3470) and could take some resistance measurements.
I am very curious if these very low readings are normal or the CPU is demaged.
Thank you.
 

Online wraper

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Re: PC CPU resistance.
« Reply #1 on: November 01, 2024, 10:20:40 am »
There is small chance resistance might be normal, although I'd expect resistance this low from something more modern. You really need a measurement of CPU based on the same die to be sure.
Quote
The i5 measures very low, 0.8-1 Ohms
BTW does this measurement include multimeter lead resistance or not? If it includes something like 0.4 ohm with leads shorted without measurement nulling/subtraction, then it's nearly certainly fried.
« Last Edit: November 01, 2024, 10:28:37 am by wraper »
 

Offline ktuluTopic starter

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Re: PC CPU resistance.
« Reply #2 on: November 01, 2024, 10:40:15 am »
Without leads resistance. Btw this is measured on VCC, but VCCAXG is also a few Ohms.
According to this: https://www.gadget-manual.com/pinout-cpu/
 

Offline ktuluTopic starter

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Re: PC CPU resistance.
« Reply #3 on: November 02, 2024, 07:35:48 am »
What voltage is on VCC?
I tried with 1V, but at 1A no capacitor gets hot. Without a thermal camera it is hopless. I thought maybe I get lucky and only a cap is partially shorted.
 


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