Worried that my new build has a faulty PSU

[Cyber Akuma]

PSU: Seasonic X750
Motherboard: Asus _8Z77-V Deluxe
CPU : i7 3770K
GPU: EVGA GTX 670FTW + EVGA GTX650 for PhysX

Yes, its plugged into a very good UPS. And from what I've been told even with all the other expansion cards and drives in it, it should come nowhere near using up 750 watts.

The system I just built (and still haven't finished) used to run fine at first, kept it running for days and nothing wrong.

I was then trying to overclock the CPU, and after I got past the initial bluescreens due to the vcore being too low, I still couldn't maintain a stable overclock no matter what because eventually the system would fail and reboot due to the motherboard's Anti-Surge protection.... most of the time, a few times the system would just shut down and refuse to turn back on unless I either used the power button built-into the motherboard or unplugged it for a while.

So, assuming the overclock might be the problem, I resetted the motherboard to default settings and tried the burn-in tests (mainly Prime95 and IntelBurnTest) again just to make sure... it still happened... then happened again while I wasn't even taxing the system and just web-browsing on it.

So I turned it off and checked all of my connections, I noticed that one of the PCI-e connectors going into the modular bay of the PSU hadn't been inserted all the way. It was still fairly in there, but not far enough for the connector to click. I did so and checked all my other connections and tried again. Considering how far the connector already was in though, I doubted that was the issue.

Prime95 ran for 14 hours on blend mode with no problems, I was able to run several game demos with all settings maxed with no problems, the system had been running for over 24 hours now with no issues (it never even managed 10 hours before when it started spiking). Then just to be safe, I decided to run IntelBurnTest for 20 runs on Maximum while also running FurMark at highest 1080p settings to make sure my PSU can take it.

.... it rebooted due to a power spike within 10 minutes.

I have no idea what to do, I am assuming the PSU is faulty, but I just wanted to hear others opinions on the matter as well.

Could I have damaged something by trying to overclock? At 4.5Ghz I never let the vcore go above 1.345v or the CPU temps go above 92C, although 92C was a spike and usually even when running burn tests it was below 90C (and well well WELL below that when not burntesting).

Is it advisable to run IntelBurnTest on maximum for extended periods of time? (I calculated based on a 2-run that it would take 10 hours at 4.5ghz to finish 20 runs, not sure how long it would take on the stock 3.5) Did I screw up running both IntelBurnTest and FurMark on max at the same time? (The GPU is stock overclocked but otherwise I haven't messed with overclocking that).

Any help with this is appreciated, I just sincerely hope I didn't damage anything.

[photolady]

SeaSonic isn't the better PSU. Try Corsair, OCZ, Antec, or Xion.

When you ran the calculator did you add all devices plugged into your USB ports? And add 30% to the age of expected use of the PSU. That option changes total amount of wattage quite a bit. Per Extreme Calculator on PSU aging:

Electrolytic capacitor aging. When used heavily or over an extended period of time (1+ years) a power supply will slowly lose some of its initial wattage capacity. We recommend you add 10-20% if you plan to keep your PSU for more than 1 year, or 20-30% for 24/7 usage and 1+ years.

[Train]

And closer to idle the PSU is under load, the longer it will last.

They say a 340 watt will work, but I am using a 600.
http://www.extreme.outervision.com/p...ulatorlite.jsp

[photolady]

My PSU is a 750W but my video card does use the plug in that my other card had to have and Extreme calculator says I need a 500W one. But I'd rather have a known brand PSU with extra power than one that isn't branded and less power.

[Midknyte]

Seasonic is actually a pretty solid brand.
http://www.anandtech.com/show/3655/s...c-xseries-750w

I can't really say about the overclocking, because it's not an exact science. The more hardware you have, the more sensitive the whole system will be.

[Cyber Akuma]

From my understanding, the Corsair AX series are practically a re-branded Seasonic X series.

Also, I was getting these issues even on stock settings now. Some people suggested that my motherboard's over/under voltage protection is very sensitive, especially when multiple applications are polling for temperatures and voltages (I had several running to check).

Going to disable all of them, and uninstall the AI Suite, and see if that fixes it, only going to monitor temps with RealTemp while stress testing.

[Shinma]

Doubt that the power supply is the issue, it is a Seasonic after all.

More likely damage to mobo during overclock will occur, before a power supply is damaged.

[Shinma]

From my understanding, the Corsair AX series are practically a re-branded Seasonic X series...

They are.
Except the CMPSU-1200AX model. That model is Flextronics.