most complicated question ever

nesr · Mar 13, 2014

hey guys i have recently bought the fx 8350 but i didn't get the mobo yet, i was abit skiptecle if the cpu was faulty so i tried a crazy idea i brought my multi-metre device to measure the resistance of the circuit, well im glad that i had some digits on the screen

my question is, would that harm my cpu because of the "Potential Difference" of the device used ?!

any help/thoughts is appreciated

Deuce65 · Mar 13, 2014

1. Wouldn't the time to ask this question be BEFORE you did it?
2. How does that in any way tell you if it works or not?
3. I guess you'll find out when you get the MB.

nesr · Mar 13, 2014

guess i found the answer myself here it is if anyone is intrested

http://xbox-experts.com/tutorial/how-to-understand-if-the-gpu-and-the-cpu-is-burnt/

Someone Somewhere · Mar 13, 2014

Firstly, that's for an XBOX. No reason that desktop CPUs are the same.

Secondly, there's not always one spot that will tell you if it's dead. IIRC the only reason you'd get a short circuit across a particular pair of pins is because the XBOXs where probe to overheating in a certain way.

There's lots of cases where this could irreparably damage the chip. If you applied 9V (what a lot of multimeters use to test resistance) across the right signal pins, you could easily fry it.

nesr · Mar 13, 2014

oh does it appear to the naked eye if its fried or not

Someone Somewhere · Mar 13, 2014

Generally not. It all happens under the IHS and can't be seen.

There's a lot between 'OK' and 'Fried', though. A chip can be OK in some bits but have a bad core or two, for example.

nesr · Mar 13, 2014

just checked and the device uses 3volts

Someone Somewhere · Mar 13, 2014

Still double what I'd want on the DRAM pins. And some stuff is polarity-sensitive.

nesr · Mar 13, 2014

just came back from a computer centre and tested it, everything was completely fine... i guess its not much of the risk you imagine

Someone Somewhere · Mar 13, 2014

It depends on where you put it. Some stuff could fry it, some wouldn't.

A large number of the pins should be shorted, because there's a lot of Vcc and Gnd pins paralleled up.

nesr · Mar 13, 2014

okay, but is it possible that the cpu is damaged even if it boots up?
thx for the valuable info

Someone Somewhere · Mar 13, 2014

Potentially. One of the memory channels could be damaged, but not the one you're using (if you've only got one stick of RAM). Or one of the PCIe lanes.

Or it could be just a reduced OC headroom. Done a stress test?

Bluez · Mar 22, 2014

I just wanted to say my cpu is working totally fine ive done a stress test and all of my dimms are workin fine

To anybody who had done the same thing as me don't freak out

~nesr

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