10.8.4 System Shutdown & Reboot by itself

[elracador]

Hi,

I've made severl hacks and mostly on Z68 mobos.
Now I've made one on a brandly new Z77 UP5 TH
and the computer Randomly Shutdown and Reboot by itself.
The computer shutdown as if I was shutting it down with the Power Button
and then Reboot.
this can Happend Severals time in a Day or just once.
Working with some programs or just leaving the computer with no activity.
I didn't find any logic behind the issue here.

My specs:
OS: OSX 10.8.4
MOBO: GA - Z77 X UP 5TH
CPU: i7 3770K ( overclocked @ 4.2 Ghz)
with a CM EVO 212 ventirad ( temps doesn't cross the 42°C on normal use)
GPU: Asus Passive Nvidia GT 640 2 GB
RAM: 4x 8 Gb ( Kingston HyperX blue)
PSU: Cooler Master Silent Pro M620W


Install process:
Unibeast USB Install
Multibeast

First of all I've sent back the Mobo, CPU and RAM bacl to Gigabyte.
They tested everything and the parts are fine.
I haven't tested the PSU but I've never experienced an issue on the CM PSU in over 40 computers I've made.

So.

Any idea?

Is this an install issue or an hardware issue ( CPU or PSU?)

Thanks in advance for the help.

 

[jmpa]

Try disable Disable Pll overvoltage on bios.

 

[elracador]

Thanks. i will try.

Could you please give me all the Stable Bios Settings for this Mobo?

Thanks

 

[elracador]

So,

I've changed Pull Overload to DISABLED but still getting Anormal Reboot.

I've canceled the Overclock and left the RAM at 1333 Mhz ( insted of 1600 Mhz which is the product frequency)
and now is stable.

The strange thing is that Gigabyte has tested the Mobo, CPU and RAM and says that everything is fine.


What can be?

 

[elracador]

( SOLVED) 10.8.4 System Shutdown & Reboot by itself

SOLVED:
it was the PSU that was not handling the overclocking because of voltage issue.

PSU = Cooler Master Silent Pro M620W

stats says that this Cooler Master PSU has issue in 1 over a 1000 units.

it has to happened to me.

What a lucky man....

So changed the PSU with a new Unit, same model.

Now everything works fine