PSU Corsair ax1200 low +12V

[Matthew Fox]

Hello,
My computer seems to randomly reboot. It does not BSOD, it just seems that the PSU cuts out and the computer restarts. I ran two utilities (HWiNFO and SpeedFan) as well as consulting the BIOS directly. They have all come back with the average voltage being 9.960V on the 12V rail.

I am running a EVGA nVidia GFX 680 and an intel i7 960 @ 3.2 (no overclocking on any component).

(here is a screengrab of the HWiNFO readout: http://imgur.com/50OPX6a )
Do the voltage numbers indicate the PSU is the culprit, or does it sound like something else?

Thanks so much for any feedback. This one has stumped me pretty good.

 

[bigshootr8]

Hello,
My computer seems to randomly reboot. It does not BSOD, it just seems that the PSU cuts out and the computer restarts. I ran two utilities (HWiNFO and SpeedFan) as well as consulting the BIOS directly. They have all come back with the average voltage being 9.960V on the 12V rail.

I am running a EVGA nVidia GFX 680 and an intel i7 960 @ 3.2 (no overclocking on any component).

(here is a screengrab of the HWiNFO readout: http://imgur.com/50OPX6a )
Do the voltage numbers indicate the PSU is the culprit, or does it sound like something else?

Thanks so much for any feedback. This one has stumped me pretty good.

Hmm, I wouldn't think anything is wrong with your power supply. The voltages look fine. I would maybe look at other things as well maybe memtestx86 to test out your ram. Or possibly taking a look at your hard drive's to see if there are issues there. Your temps look fine as well to note. With your system you could power 2 of them on that power supply just about so beyond that I'd take a look at the other variables, graphics card, memory, hard drive.

 

[Matthew Fox]

Hello,
Hmm, I wouldn't think anything is wrong with your power supply. The voltages look fine. I would maybe look at other things as well maybe memtestx86 to test out your ram. Or possibly taking a look at your hard drive's to see if there are issues there. Your temps look fine as well to note. With your system you could power 2 of them on that power supply just about so beyond that I'd take a look at the other variables, graphics card, memory, hard drive.

Thanks for the quick response!

You mention checking the hard drives for any issues. I am running a Samsung 840 SSD (256GB) and a 2TB Western Digital RE4. Both are on the same controller (Intel, not Marvel). I did see some issues when they were each on different controllers, but putting them on one seemed to resolve the issue a while ago, and now it is back.

Do you have any suggestions for good HDD testing tools? I wish the thing would throw a BSOD so I could at least get a core memory dump, but alas. It snaps its fingers and it's off.

 

[bigshootr8]

Hello,
Hmm, I wouldn't think anything is wrong with your power supply. The voltages look fine. I would maybe look at other things as well maybe memtestx86 to test out your ram. Or possibly taking a look at your hard drive's to see if there are issues there. Your temps look fine as well to note. With your system you could power 2 of them on that power supply just about so beyond that I'd take a look at the other variables, graphics card, memory, hard drive.

Thanks for the quick response!

You mention checking the hard drives for any issues. I am running a Samsung 840 SSD (256GB) and a 2TB Western Digital RE4. Both are on the same controller (Intel, not Marvel). I did see some issues when they were each on different controllers, but putting them on one seemed to resolve the issue a while ago, and now it is back.

Do you have any suggestions for good HDD testing tools? I wish the thing would throw a BSOD so I could at least get a core memory dump, but alas. It snaps its fingers and it's off.

No problem man! I can see this being a frustrating issue to come across. Maybe try crystaldisk they show some pretty handy health info details.

 

[zvonkorp]

Sorry for the necro post but i found this i an a search for 1200AXi +12v and tihs was a top result ,and this was selected as the best answer - wihch i don't understand why that happened.
Did the poster of the best chosen answer even look at the picture the OP linked? it clearly shows terrible voltages on all 3 rails, 3.0 on the 3v, 4.somethingon the 5v and an average voltage of just 10v on the +12v rail.

How do any of those voltages look fine to you????

OP - RMA your power supply, dont waste time swapping parts out -idk if youre still having this issue or not but I hope you didn't take this guy's advice and I'm leaving tihs post here so other people don't come here and find information like 3v on the +3.3 rail and 10v on the +12v rail being acceptable voltages and then discount that from their troubleshooting and start replacing other parts needlessly all the while they have a dud power supply (regardless of it being from a top tier manufacturer, theres always duds, just less as you go up the tiers) - and they waste time, money, energy, due to bad advice which is becoming more and more prevalent online.

Please, can we fix this thread so that the currently selected best answer is NOT the one posted here because i found this page after clicking one of the first 5 results on google for a pretty common search term and this kind of information is very misleading.

Guys, and sorry to the OP as well as the respondant, thank you for the effort but normal ATX spec calls for all operating voltages put out from the power supply to be within these standard deviations:

Voltage Rail Tolerance
+5VDC ± 5 %
-5VDC (if used) ± 10 %
+12VDC ± 5 %
-12VDC ± 10 %
+3.3VDC ± 5 %
+5VSB ± 5 %

So to the OP, your power supply with its ~+10v output on the +12vdc is almost 3x more than the allowable 5% deviation the specification calls for. The minimum voltage you should have on the +12v rail is 11.6v and that is the most allowed for by a very loose specification imo. The lowest voltage allowed on the +3.3v rail is 3.135

Hello,
My computer seems to randomly reboot. It does not BSOD, it just seems that the PSU cuts out and the computer restarts. I ran two utilities (HWiNFO and SpeedFan) as well as consulting the BIOS directly. They have all come back with the average voltage being 9.960V on the 12V rail.

I am running a EVGA nVidia GFX 680 and an intel i7 960 @ 3.2 (no overclocking on any component).

(here is a screengrab of the HWiNFO readout: http://imgur.com/50OPX6a )
Do the voltage numbers indicate the PSU is the culprit, or does it sound like something else?

Thanks so much for any feedback. This one has stumped me pretty good.

Hmm, I wouldn't think anything is wrong with your power supply. The voltages look fine. I would maybe look at other things as well maybe memtestx86 to test out your ram. Or possibly taking a look at your hard drive's to see if there are issues there. Your temps look fine as well to note. With your system you could power 2 of them on that power supply just about so beyond that I'd take a look at the other variables, graphics card, memory, hard drive.