spontanious rebooting issue on new-ish PC, newly upgraded.

[VirtualLarry]

The PC is thus:

GA-H81M-DS2V socket 1150 mobo
G3258 Pentium Ann. Edition (overclocked to 3.8, multi x38, vcore 1.2v)
2x4GB Gskill DDR3-1600 "Sniper" RAM, 1.5v
Crucial M500 240GB SSD (newly upgraded, brand new)
HIS 7950 3GB GDDR5 video card (newly upgraded, brand new)
Antec EarthWatts 500W PSU (sat in storage for 3-4 years, newly installed as of a few months ago)

Previously, this PC had an HIS 7790 1GB GDDR5 video card, and was running @ 3.8 on the CPU, doing distributed-computing without issue.

I just recently (in the past few days) upgraded it, with a Crucial M500 240GB SSD, and the 7950.

I experienced two reboots (while I was not at the PC), that showed up as "Kernel Power Error" in the Eventlog.

GPU-Z reports the 12V line (through the video card's sensors) as low as 11.63, and as high as 11.94. When GPU-Z reported 11.78, my DMM reported 11.92-11.93 stable on an unused molex. GPU load was 82%.

I have a thread in PSUs about where the cutoff for 12V line is.

With the DMM measurement, I no longer think that the 12V line is dropping too low. It seems like it must be something else.

I'm a little confused, how a brand-new SSD and a brand-new video card could be causing hard reboots (rather than bluescreens), unless they literally have a power short somewhere within them.

Edit: Oh, and the PC is on a CyberPower UPS (less than 1 year old), 550VA / 330W. According to their software, the most that this rig with the 7950 has drawn, is 224W at the wall, including my LCD monitor. No AC power events have been recorded.

According to GPU-Z 0.8.0, max temp for GPU was 70C, and according to CoreTemp, max G3258 core temp was 83C.

 

[Ketchup]

The spec allows too much lee-way for the 12v rail, IMO. I would try it in straight to the wall, then to another outlet if that doesn't work. If it's still crashing, it's probably time for a new power supply.

I think the video card is fine, it is just pulling a lot of power on that 12v line.

 

[denis280]

The spec allows too much lee-way for the 12v rail, IMO. I would try it in straight to the wall, then to another outlet if that doesn't work. If it's still crashing, it's probably time for a new power supply.

I think the video card is fine, it is just pulling a lot of power on that 12v line.

I agree with ketchup.once got a system doing the same thing on me

 

[VirtualLarry]

Solved? See http://forums.anandtech.com/showthread.php?t=2418100

 

[denis280]

Great:thumbsup:

 

[Ketchup]

Great news!

 

[VirtualLarry]

UGH! NOT SOLVED!

Was just using my PC earlier, came back to it just now... and it had rebooted. "Kernel Power Error". 1/26 7PM-ish

 

[Ketchup]

Hey, do you have more than one battery backups? Have you tried swapping?

 

[VirtualLarry]

Yeah, it rebooted again, while I was at the PC.

I have three PC desks, two against one wall, and a third against another wall. All three have identical battery backups.

Well, it sounded like all three backups clicked, but the light next to me didn't flicker.

The main PC rebooted, the third PC didn't reboot, but recorded a 2s brownout.

So, either the battery backup isn't working (I think the PSU has APFC), or my apt wiring has issues, or both.

Edit: The fact that my server's APC BX1500 UPS didn't click over, not the wall lights flicker, makes me think that the issue was more localized to the wall outlet that the first two PCs are plugged into.

I have previously smelled what I thought was insulation in the wall melting, in that wall.

I also lost one of my 26" LCD monitors suddenly, when plugged into the wall there. (Without a battery backup, I think.)

 

[XavierMace]

Sounds like you may be pulling too much power from that outlet.

 

[VirtualLarry]

Sounds like you may be pulling too much power from that outlet.

230W at the wall is too much? My outlets are 20A US / North American outlets.

 

[Bubbleawsome]

Melting insulation is not a good thing. Don't burn your hose down! D:
I'd get that checked out.

 

[nightspydk]

I had a wall outled literally melt and pt using another in the same house, so it might just be poor wiring with that one your using. Cannot say why the relay didnt kick in, but yes why not just try another.

 

[VirtualLarry]

Now going on working hypothesis that my Antec EarthWatts 500W PSU is incompatible with my stepped-sine-wave CyberPower UPS.

The power glitches at the wall are another issue, that will probably have to be checked out.

 

[denis280]

The power glitches at the wall are another issue, that will probably have to be checked out.

This don't sound good at all