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  msi 870a g54 mobo 2.8 ghz x6 amd phenom 2 fryed help 
 Date Written 
joe mackey Jun 19, 2011, 03:23pm EDT Report Abuse
I overclocked with oc Genie lite all went good was running at 98 degrees then I decided to run prime 95 and I came back 40 mins later and my comp was off. The power led was flashing. I tried to turn it on It did not turn on. I left it be for about a half hour tried it again led still flashing. Did not turn on tried to reset cmos didn't work either. Now when I try to boot it up all the leds flash and that's it. No fans nothing. What happened. Fryed mobo bad psu. Or the processor . I hope not

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john albrich Jun 19, 2011, 07:17pm EDT Report Abuse
>> Re: msi 870a g54 mobo 2.8 ghz x6 amd phenom 2 fryed help

Unfortunately I suspect you've fried something, and you're into basic debug mode.

It could be motherboard thermal mechanical damage, and/or fried CPU, and/or damaged on-mobo power regulators, and/or other damaged item(s).

It could be a single-point failure or it could have cascaded (e.g. a mobo failure then damaged one or more additional items)

Hard lesson learned: NEVER leave your computer unattended when testing new configuration changes no matter how trivial they may seem, especially when using software that by definition has the in-built capability to overheat and damage CPU and RAM (and both any OC utility and Prime95 alone have that potential). However, you should know that your changes (OC followed by stress testing) by no means had a trivial potential consequence.

I think your only option at this point is to test invididual items via swapping known good items. (e.g. use a known good CHEAP CPU to determine if the mobo is good and the CPU was the only thing damaged. Use a CHEAP CPU because there's a chance the mobo power regulation circuitry was fried which might in turn fry any CPU installed. Test with only single sticks of RAM, etc.

If you have an Intel CPU, it's more likely the CPU was not damaged and it's one or more of the other potential victims.

edit to add:
My personal experience with Prime95 "torture test" on a 4 core AMD CPU with all CPU clocks and voltages at STOCK settings. I was testing to see how well the "stock" fan/heatsink kept the CPU cool under stress conditions. I started out by manually limiting the "torture" test to 1 core, I then manually added a second "worker" to include the 2nd core. Only after the CPU temp stabilized (well under maximum specified safe level) I added in a third "worker" to include 3 cores. The INSTANT I started the 3rd core going, the CPU temps started ramping up to critical levels in less than 1 minute. Even with the stock fan running at max RPMs (approx 3100), the CPU temp was rapidly approaching the overheat threshold for that CPU. Had I not been there to manually stop Prime95, the CPU definitely would have overheated within moments.

john albrich Jun 19, 2011, 08:09pm EDT Report Abuse
>> Re: msi 870a g54 mobo 2.8 ghz x6 amd phenom 2 fryed help

Something to keep in mind for any future testing that can cause overheating...

The freeware program "CoreTemp" has an "Overheat Protection" option. This option allows the user to tell the computer what to do if the CPU temp exceeds a user-specified value: hibernate, sleep, power off, etc. CoreTemp is not the only program with similar capabilities, but it is probably the simplest to use.

Some motherboards bundle a similar protection program or may even have something in BIOS Settings to shutdown the computer if it's over-temp.

Other programs (e.g. Speedfan) also allow you to do things like run other programs if a user-selected temp is exceeded, or a fan fails, etc. Such a program could perhaps be used to throttle-down the CPU, kill the stress program's process, or send an email to a cellphone to alert you that temps are critical (however, you might arrive too late to do anything about it).

One drawback of relying on such additional programs, is that if you're using a stress program (e.g. Prime95), it's heavy CPU usage might keep these other processes/programs from running reliably or kicking off other programs quickly enough to do any good.

It's also known that IF you use a motherboard option to "unlock" some CPU cores (e.g. try to turn a 3-core CPU into a 4-core, etc) that the CPU temperature reported may no longer be reliable (or even be available).

So the best thing is to always stay with the machine and manually monitor the temps in this kind of situation.

joe mackey Jun 19, 2011, 10:55pm EDT Report Abuse
>> Re: msi 870a g54 mobo 2.8 ghz x6 amd phenom 2 fryed help
Yes very hard lesson learned. And I believe all 6 cores were running right away well I'm never doing that again. Owel gives me an excuse to upgrade my mobo and or processer.thanks for the info

bo bo Dec 10, 2011, 09:36am EST Report Abuse
>> Re: msi 870a g54 mobo 2.8 ghz x6 amd phenom 2 fryed help
Only a total idiot would run that CPU at 98 degrees !!
Everybody knows those CPUs are never supposed to go over 70.
PCs are way to advanced for you, stick to coloring books and try not to color outside the lines!



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