12V rail too low voltage

[stambo]

So the problem was that my PC starts again after i shut it down.A buddy told me that it might be because of the PSU and my PSU might be broken, so i decided to run a test and check the voltage rails.What i saw isnt really pleasing.Is there any chance that my PSU isnt broken and OCCT is displaying wrong.I also read in other forums that PC wont even start with such low voltage on the 12v rail, but mine starts and im not getting blue screen ot whatever, even when i play a game on ultra graphics card and CPU work properly and the fans also.So is there any little chance that my PSU isnt broken and it only shows it wrong?

 

[smorizio]

be care full a lot of older aps dont read the newer mb right. try using spacy from ccleaner people and open hardware monitor to see if the voltage was read right also use the bios environment screen inside the bios to see if the 12v leg is ok. on most newer pc it a bios bug if a pc on shutdown resets or sits with the fans maxed out and the screen blank.
to fix the issue pull power from the wall let the mb drain and then clear the cmos then see if there any bios updates for the mb if there is run the update twice to update both bios.

 

[GhislainG]

If +12v was that low, then the PC wouldn't even post. Check your BIOS settings and disable everything that could power up the PC (mouse, keyboard or LAN).

 

[stambo]

here is HWmonitor

 

[GhislainG]

HWmonitor can't read your motherboard. Check in the BIOS or you tools provided by your motherboard manufacturer (if available).

 

[stambo]

Here is the BIOS, sorry for the slow answer tho.

 

[GhislainG]

Now you see your voltages are within specs.

 

[smorizio]

+12VDC

±5%

+11.40V

+12.60V
your 12v rail is a little low on that power supply. it may be low if it lightly loaded.

 

[GhislainG]

+12VDC

±5%

+11.40V

+12.60V
your 12v rail is a little low on that power supply. it may be low if it lightly loaded.

How can it be a little low at 11.88 volts?

 

[smorizio]

the 12v rail should be per intels spec 12v plus or minus a little bit. the low range is 11.4v. your unit right now is 11.8v so it .4v from the low limit. depending on parts and loading your ps could drop when running below 11.4 min. most vendor try to keep then units on the high side of 12v.

 

[GhislainG]

the 12v rail should be per intels spec 12v plus or minus a little bit. the low range is 11.4v. your unit right now is 11.8v so it .4v from the low limit. depending on parts and loading your ps could drop when running below 11.4 min. most vendor try to keep then units on the high side of 12v.

You should read the first post where the OP was concerned by the 12V that was slightly above 3V which obviously isn't possible. There could be an issue with the PSU that causes the system to restart, but I'd suspect a BIOS or OS setting.

 

[Vic 40]

You should read the first post where the OP was concerned by the 12V that was slightly above 3V which obviously isn't possible.

Not just that,

So the problem was that my PC starts again after i shut it down.

You could make a log with hwinfo32 to see if the +12voltrail get's to close to the min. value,

Download hwinfo32,

http://www.hwinfo.com/download32.html

You can open hwinfo32,after that open the sensor window by marking sensors=V,after that click run,,then click at the bottom "Logging start" ,after that choose a name and place for the log. like Hwinfolog at your desktop.Leave it open and do game/stresstest or whatever you do for half an hour to hour and stop logging,at that point will it be saved.
Upload the log to a site without to much crap (!),for instance dropbox,and leave a link to it here.You could also look at the log yourself with either excel or libre office calc.

 

[GhislainG]

hwinfo32 will hopefully work better than OCCT, but using a DVM still is best. I don't understand why people use software to check voltages (other than the BIOS that usually is fairly accurate). A DVM is an inexpensive and a very useful tool.

 

[Vic 40]

Sorry ... DVM?

You won't see fluctuations in the bios when not being able to stresstest.

 

[GhislainG]

But you'll see them with a Digital Volt Meter (DVM). Sorry I presumed you were technical because you are a PSU expert.

 

[Vic 40]

Digital Volt Meter (DVM). .

English. I'm Dutch,it's an international forum,but thank you. 😉

Truth to be told is that those badges only mean so much.Someone who hasn't got a clue and still get's voted best answer anyway can become expert and really know nothing at all.Is probably not going to happen,but theoretically is it a possibility.

For when the OP has a DVM/multimeter,
http://www.google.nl/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CCEQtwIwAA&url=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3Dac7YMUcMjbw&ei=LGPKVKK4IYasOsfSgbAN&usg=AFQjCNGlMK2oSARZ_6jpvbLb9HuAE45VDw&bvm=bv.84607526,d.ZWU&cad=rja

 

[GhislainG]

The OP can simply check the 12v rails if the PSU has more than one (which is something software doesn't know). Disconnecting the PSU to test it that way is worse than the BIOS where the 12V is used.

 

[Vic 40]

With the video he knows what is what and yes he could take an unused molex when the psu is running in the system and check the voltage that way.

 

[stambo]

https://www.dropbox.com/s/z3ljy7j0vgx9ucc/bleh.CSV?dl=0

Here is the file and also a little picture.

Also it's not 30 minuts to 1 hour gaming, i just saw the answers too late and decided to upload a little gameplay before i go to bed.Is it really important to be 30 minutes to 1 hour, if so i will do another one tomorrow for 1 hour.

 

[GhislainG]

The +12V rail is not as stable as it should be, but it stays within specs. Since you didn't provide any info about your system, we don't know if your PSU has a single 12V rail or multiple rails. Test with another PSU, but I'm not convinced that's the source of your issue. Does the system completely power off and instantly restarts or does it behave like it's rebooting? If you press the power switch for longer than 4 seconds to power off, does it starts again? Is this a relatively new system?

 

[stambo]

You can see my system under my every comment.Anyway the system is kinda new i bought it just 1 year ago.When i shutdown the pc it shutdowns completely and then starts again in 4-5 seconds.If i shut it down from the power switch it does not start.

i5-4670k
gtx 770 evga sc
8gb corsair vengeance 1600mhz
corsair rm750 PSU

 

[GhislainG]

You could boot from a Windows 8 installation DVD, select Repair and then click the icon to shutdown the system. If the system doesn't restart, then you'll know a setting in the OS causes the restart issue.

 

[stambo]

I tried to repare it but it said that there is some kind of error and couldnt proceed.

 

[GhislainG]

You don't want to repair, you simply want to shutdown to determine if the issue is the OS or the system. If you can't do it from a Windows DVD, use Linux.

 

[stambo]

Ya, when i shut it down it didnt start again.When i bought my PC i was wiht windows 7 and i didnt have such problems with the restarting.After like 5-6 months i wanted to see how windows 8.1 looks like and i installed it.Maybe after 1-2 month with windows 8.1 my PC started doing this problem so i was like "ok, its just faulty windows 8.1 and its causing this problem" and moved back to windows 7 but the problem was still there 😀 so i dont really thinkg that the problem is in the OS.But as u said from the booting device when i clicked to shutdown it didnt start again..im kinda confused 😀

By faulty windows 8.1 i meant faulty because im downloading them from a tracker for free, hue 😀