Do PSU's have some kind of 'self reseting circuit breakers?'

[petieng]

I'm just curious, and googling revealed nothing.

Yesterday I thought I had bricked my PC after an "accidental FSB overclocking accident". Very bad things happened and my PC went dead within seconds, just before I yanked the cable out myself.

I tried to turn it on again, but it was completely dead, as if it just wasn't plugged in. I thought I've either toasted everything or just blown the PSU. After the initial "oh fuck oh fuck" panic I took the side panel off to feel the heatsinks and give it a good sniff. Nothing was too hot or smelt of burning. I was about to go to bed and sleep on it when I decided to try it one last time and it turned on and worked flawlessly. Ran some stability tests and it's fine.

This is the second time it has happened. A few years ago my old PC went out with a pop for no reason and it was completely dead, but worked fine 10 minutes later.

So, I'm just wondering do PSU's have some kind of fail safe like relays that trip when there's a surge or overheating, but reset themselves after some time, when the danger should be long gone?

Or is it something else entirely?

Feel free to rate me box for accidently over-overclocking my FSB. I know I would.

[Turbis2]

-snip- Misread the thread

Maybe you shouldn't mess with the FSB. You know if you raise the FSB to a certain limit you will need to raise the voltage on the core in order for it to get enough power.

Edit; and raising FSB is not the same thing as overclocking. You can lower an FSB and raise a multiplier to get a higher clock on a processor.

[jivemasta]

My computer will overheat sometimes, and will turn off just like that. I thought it was a timed thing, but it's not. What mine does is shuts off until I either turn off the power supply or unplug it and then leave it off/unplugged for a while to drain. Then it will come right back on.

[Tezza1234]

Some are thermally protected, If so the Thermal switch will reset when the temperature drops well below its trigger temperature.

This applies to the PSU overheating though, Not the computer. So you may be overloading the PSU if it IS the PSU cutting out.

[Roast Beast]

[QUOTE=jivemasta;17026616]My computer will overheat sometimes, and will turn off just like that. I thought it was a timed thing, but it's not. What mine does is shuts off until I either turn off the power supply or unplug it and then leave it off/unplugged for a while to drain. Then it will come right back on.[/QUOTE]

This is probably what happened to you OP, since raising the FSB wouldn't put any extra strain on the PSU unless you had your voltages set to auto, and even then it wouldn't be a whole lot.

[petieng]

[QUOTE=Turbis2;17026521]-snip- Misread the thread

Maybe you shouldn't mess with the FSB. You know if you raise the FSB to a certain limit you will need to raise the voltage on the core in order for it to get enough power.

Edit; and raising FSB is not the same thing as overclocking. You can lower an FSB and raise a multiplier to get a higher clock on a processor.[/QUOTE]

Yeah I know how it works. I didn't mean to overclock it by as much as I did. I raised the FSB speed a very small amount and monitored my temperatures. I thought I had reset all the frequency sliders when i set it back to normal, but the FSB slider was way up. Silly, I know and I've no idea how that happened but it did.

[Jimmy422]

My last PSU had some sort of failsafe, but i think it was only for power surges.

[dtoporowski]

edit;

the CMOS would need to reset before it can boot again, the board probably does that automatically, and you would have to wait.