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AMD K6-2+ 500ACZ resistance between GND and VCC2?

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First post, by texspex

Posted on 
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Hello.

I received an AMD K6-2+ 500ACZ from China and it does work, atleast in my short DOS tests.
But I'm measuring only 11 ohms between GND and VCC2 on the CPU pins. Which sounds very low to me.
And in diode test mode the multimeter beeps for a short. I'm worried the CPU might be failing internally.
This is the only plus CPU I own so the only other CPU I can test is a regular AMD K6-2 350.
Which measures around 7kohm resistance between GND and VCC2.

I'm wondering if anyone else could test their K6-2+ if it also measures such a low resistance between GND and VCC2?
Or if anyone already knows that this is normal behavior for a plus CPU?

https://en.wikichip.org/wiki/File:CPGA-321_K6-2_pinmap.svg

Reply 1 of 2, by majestyk

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This "low" resistance would mean a current of 0.18A (I=U/R -> 2/11=0.18) and a power dissipation of 0.18 x 2 = 0.36W.
In reality the power dissipation of the core voltage will be about 10W. So the resistance you measured is far too high. During operation the resistance will be about 0.4 Ohm.

The reason is that your multimeter does not measure the CPU under operating conditons.

If your CPU *would* have some serious hardware defect, it wouldn´t work at all.

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