[Cashtration]

On 5 separate occasions in the past month, my comp has suddenly shut down and upon rebooting itself come up with the motherboard's power surge protection screen. At the times this has occurred, it has consistently shut down and unsuccessfully attempted to reboot for 5 - 15 minutes. It never reaches the OS screen and on a couple of occasions has thrown up an 'overclocking failed' message, despite nothing being overclocked. Peripherals have also been unresponsive after these episodes and require a fresh reboot before working. They have also ceased working after the computer has been left idle for a while (such as overnight) and only work after a reboot.

Given that the PSU has over/under voltage protection and is also plugged into an anti-surge power board, I'm inclined to think that the fault lies with the motherboard. No other devices plugged into the power board show any problems at the time of the 'surges'. I have checked over all the internal cables and everything there is fine.

Specs:

Asus P8P67 Deluxe
Intel i7 2600K
Corsair Dominator RAM 16GB
Gigabyte HD7970 Ghz Ed.
Corsair AX850

Any insight on the problem would be greatly appreciated.

 

[DeXel]

Without spare parts it's really hard to tell. To remove the possibility of short, or bad power socket, build the system outside of case and use different power socket preferable in a different room.

In cases of sudden shutdowns, the problem mostly lies in PSUs. That is if your system temps aren't the issue.

Running some CPU, memory stability tests won't hurt too. Memtest for RAM, Prime95 for the CPU.

What's the speed of those RAM sticks?

 

[jlhawn]

how long have you had the computer and how long has the corsair power supply been in it? I read about 6 months ago on the corsair forums that some ASUS motherboards required a bios update when using some model of Corsair power supplys. have you posted this problem on the corsair forum site in the power supply section? there were people on their site with similar issues as yours.

 

[Cashtration]

Quote:

Without spare parts it's really hard to tell. To remove the possibility of short, or bad power socket, build the system outside of case and use different power socket preferable in a different room.

In cases of sudden shutdowns, the problem mostly lies in PSUs. That is if your system temps aren't the issue.

Running some CPU, memory stability tests won't hurt too. Memtest for RAM, Prime95 for the CPU.

What's the speed of those RAM sticks?

I have spare parts around, just not a motherboard nor a PSU of high enough wattage. The problem there is that this has only happened a handful of times over the course of a month, I can't just swap something out and get an instant, reliable result.

The running of stability tests is one thing I can and will do. As for the speed of the RAM, supposed to be 1866Mhz, however I think they're running a bit slower than that but since I'm at work I'm unable to check for the next hour or so.

 

[DeXel]

You don't have a 400W PSU?

That's about how much you need. If it's something less than 400W, just use your system with integrated graphics.

1866Mhz for RAM means that you've enabled XMP. If you didn't then they most likely run at 1333Mhz. If you did enable XMP it explains OC fail message.

 

[Cashtration]

Quote:

Originally Posted by jlhawn

how long have you had the computer and how long has the corsair power supply been in it? I read about 6 months ago on the corsair forums that some ASUS motherboards required a bios update when using some model of Corsair power supplys. have you posted this problem on the corsair forum site in the power supply section? there were people on their site with similar issues as yours.

Its a frequently updated build that I dubbed as complete about 6 months ago. This power supply was added about mid-2011.

I haven't posted anywhere else at this stage, I had figured the power supply was the less likely culprit as its supposed to have safeguards against this kind of thing and I have had to RMA this particular model of motherboard before for defects. I'll have a look into the corsair forum as this is an issue I haven't heard of.

 

[DeXel]

Even the best products will have few defective units. Rule #1 of troubleshooting, don't assume that something couldn't fail.

If it was AX860i, the first thing I would've suggested is to uninstall Corsair Link because the false voltage reporting causes overvoltage protection to kick in, but it doesn't apply to AX850 in anyway.

 

[Cashtration]

Quote:

Originally Posted by DeXel

You don't have a 400W PSU?

That's about how much you need. If it's something less than 400W, just use your system with integrated graphics.

1866Mhz for RAM means that you've enabled XMP. If you didn't then they most likely run at 1333Mhz. If you did enable XMP it explains OC fail message.

400W I do have. I suppose its better to wait for this to happen again before swapping it in since its episodic, and those episodes do last a little while.

I don't believe I have enabled it, as I said, fairly certain its running slower but I haven't checked since I put it in which was some time ago. Will report back on that one though.

 

[DeXel]

If you didn't enable XMP it could also explain this issue; however, it's highly unlikely that RAM won't run at SPD settings. Well, good luck with further troubleshooting.

 

[Cashtration]

Quote:

Originally Posted by DeXel

If you didn't enable XMP it could also explain this issue; however, it's highly unlikely that RAM won't run at SPD settings. Well, good luck with further troubleshooting.

Just ran stability tests on RAM and CPU and there were no problems detected on either.

Definitely didn't enable XMP and RAM is running at 668MHz. I honestly don't know what the deal is there. Will post around some more relevant forum areas. Thanks for the help