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  • PC restarts when electricity goes off

vegetaleb wroteI have the same problem with my PC, PC can restart in the middle of the night!
Solution? turn off the multiprise!
I have a Black Diamond power supply
Check your motherboard capacitors, if they are blown you either need to replace them or buy a new motherboard.
Dude it's like that since the first day of the motherboard, unless its a faulty intel one
vegetaleb wroteDude it's like that since the first day of the motherboard, unless its a faulty intel one
Did you check your ram with MemTest86+ ?
If so, or if you found no errors , check your PSU voltages.
It's the power supply's intolerance to the voltage fluctuation that occurs when the UPS switches from AC power to battery power, the power a PSU can deliver is not related to this. Shou when the electricity goes out, the PC draws more power? Of course not. It's just that the PSU cannot deliver load x at a lower voltage. But with a 350W power supply anyways, don't even think of running the GTX 560Ti on it, except if you would like a paperweight as a worst case scenario, or at the very least a dead PSU (some spray brown gunk when they die, too, tastes like chocolate mmmm)

Anyways, PSU = heart of the system. Don't skimp on it at all.

Also, My PSU can tolerate voltages from 90V-264V. But when the electricity goes off, my UPS does not deliver the correct voltage. It dips and spikes, and this causes a restart, then continues as a successful bootup.

@vegetaleb: Black Diamond? I realllllly recommend you replace that. You don't want fried components, do you?

@AvoK95: Not everything is RAM-related :P RAM problems quickly manifest themselves as software errors, BSODs, unbootable PCs, etc...they are not closely related to AC power problems, they may be related to power output problems, since memory is sensitive to voltage more than anything (except maybe the northbridge, chipset, motherboard stuff).
yasamoka wrote@vegetaleb: Black Diamond? I realllllly recommend you replace that. You don't want fried components, do you?
Black Diamond is a series from Point of View brand. Still not one of the best but it is considered to be tolerated as a PSU. It's not considered to be one of those 400W PSUs that you see at local computer stores.
Yep it's not a 150$ PowerSupply but nor a 20$ no name Chinese, just a mid level brand ;)
I haven't red any complaints on this model over internet
yasamoka wroteIt's the power supply's intolerance to the voltage fluctuation that occurs when the UPS switches from AC power to battery power, the power a PSU can deliver is not related to this. Shou when the electricity goes out, the PC draws more power? Of course not. It's just that the PSU cannot deliver load x at a lower voltage. But with a 350W power supply anyways, don't even think of running the GTX 560Ti on it, except if you would like a paperweight as a worst case scenario, or at the very least a dead PSU (some spray brown gunk when they die, too, tastes like chocolate mmmm)

Anyways, PSU = heart of the system. Don't skimp on it at all.

Also, My PSU can tolerate voltages from 90V-264V. But when the electricity goes off, my UPS does not deliver the correct voltage. It dips and spikes, and this causes a restart, then continues as a successful bootup.

@vegetaleb: Black Diamond? I realllllly recommend you replace that. You don't want fried components, do you?

@AvoK95: Not everything is RAM-related :P RAM problems quickly manifest themselves as software errors, BSODs, unbootable PCs, etc...they are not closely related to AC power problems, they may be related to power output problems, since memory is sensitive to voltage more than anything (except maybe the northbridge, chipset, motherboard stuff).
Finally a logical explanation. But what is the solution?

1-Get a quality PSU?
or
2-get a quality UPS?
and
3-what quality UPS do you recommend?
vegetaleb wroteYep it's not a 150$ PowerSupply but nor a 20$ no name Chinese, just a mid level brand ;)
I haven't red any complaints on this model over internet
Yes, sorry for that, seems you're both right...it's just that Chinese brands are usually exotically named :P

@Khanem: The solution is to get a good UPS that tolerates high loads, without dipping the voltage. For example, I have a 1200VA UPS, I replaced its batteries for 70% more capacity than NEW default batteries (the batteries were dead almost, that's why I replaced). Yes the UPS will last longer, but for me, I have 2 graphics cards, once I load the secondary one, which draws 70W under load, my UPS cannot tolerate the load. It dips on electricity outage. Even though my system load hasn't risen much, it's almost 400W-450W maximum, it was already bordering on the UPS's tolerance for load. A bit more load, and it can't tolerate. Don't forget that the card idles, let's say around 20W-30W, so the difference in power consumption would be much less than 70W (40W-50W).

And of course, never skimp on a PSU, so that's taken for granted. Once you have a quality PSU, you can be sure it isn't the PSU.
im Getting a 650 power supply today, i will tell you what happens
@Firas: what brand, most importantly?
AvoK95 wrote
vegetaleb wroteI have the same problem with my PC, PC can restart in the middle of the night!
Solution? turn off the multiprise!
I have a Black Diamond power supply
Check your motherboard capacitors, if they are blown you either need to replace them or buy a new motherboard.
you mean leaked? capacitors do not blow,they leak
the only thing that can cause a capacitor to blow is a really high voltage compared to its rated one,not to mention there would be serious damage to the board if a capacitor blows up, the board wouldn't work at all because it would damage other components around it
this is 90% a ups problem, its happened to me several times, the fixes ive found is
get a better ups, change battery, use a "voltage regulator" on the ups
but considering he has a really bad power supply, i highly suspect its the power supply
The PSU is good and it's not a UPS problem because vegetaleb mentioned above that the PC restarts randomly sometimes in the middle of the night. He also mentioned that he is forced to turn of the PC from the main circuit of the outlet.
*Leaked(Sorry for the mistake) capacitors can cause such problems, or unstable voltages.
But since we know that the PSU is a mid-range brand (Point Of View) we are 75% sure that it is a motherboard problem.
I asked a year ago in the Intel forum if it could be my new motherboard for i5 that is doing this, they assured me that it can't! If I remember well though the random powering up were occuring with the new system, the PSU is a couple months older...
I was thinking about a ''wake on lan'' feature hidden in some software or even hardware??!
vegetaleb wroteI asked a year ago in the Intel forum if it could be my new motherboard for i5 that is doing this, they assured me that it can't! If I remember well though the random powering up were occuring with the new system, the PSU is a couple months older...
I was thinking about a ''wake on lan'' feature hidden in some software or even hardware??!
Test by completely disabling the Lan. It could be right!

EDIT: I don't know why I just said that O.o
yasamoka is right (bottom post)
Wake-on-LAN cannot restart a system, according to what I know, neither can it shut down a system. It can "wake" the system, as in, power it on. Keep pressing F8 or F10 on bootup for advanced boot options, and press enter after you choose "Disable Automatic Restart on System Failure". Then if it was giving a BSOD when it restarts, it would display it, rather that automatically rebooting.
im changing the ups also, getting a 1500 one, power supply didnt arrive yet, both will arrive tommorow
Firas wroteim changing the ups also, getting a 1500 one, power supply didnt arrive yet, both will arrive tommorow
Yes, but what PSU??
Good day Firas,

I am going to tell you a story about UPSes at my home..

Few years ago, I bought a PCE UPS and I had the same problem as you but only randomly. Later on, I replaced it with a Diamond 800VA and as soon as the electricity went out, the PC restarted. Well something was fishy about this... I didn't know what to do. It stayed that way until one day I decided to place the UPS directly on the floor instead of the computer table and the problem had gone away. It never happened again!
And to prove it, one day I had an issue with the "multiprise" that as soon as the UPS switched to mains power, the multiprise would fail and cut off power immediately again, and no PC restarts occured.

What was wrong with the table? I don't know, but honestly, I would think of this later on...
julien_saadeh wroteGood day Firas,

I am going to tell you a story about UPSes at my home..

Few years ago, I bought a PCE UPS and I had the same problem as you but only randomly. Later on, I replaced it with a Diamond 800VA and as soon as the electricity went out, the PC restarted. Well something was fishy about this... I didn't know what to do. It stayed that way until one day I decided to place the UPS directly on the floor instead of the computer table and the problem had gone away. It never happened again!
And to prove it, one day I had an issue with the "multiprise" that as soon as the UPS switched to mains power, the multiprise would fail and cut off power immediately again, and no PC restarts occured.

What was wrong with the table? I don't know, but honestly, I would think of this later on...
the ups was grounded on the ground most probably or static electricity might have been it
as i said its all related to epic electricity we have here in lebanon