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PC won't boot after failed overclock - Page 2

post #11 of 27
It's either your motherboard or your power supply. I'd try PSU first.
post #12 of 27
40 amp psu. probably toasted trying to draw too much power through it.
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w00t
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post #13 of 27
Thread Starter 
Quote:
Originally Posted by tompsonn View Post

If you can get another PSU in there to test it, do so ASAP.
It is always possible something might be shorting out too (maybe a screw behind the board [that you may not have noticed before] with all the heat dropped and shorted something out). It would also explain the power-on for a second and then power-off straight after.
If testing the PSU passes, take the whole thing apart and run it outside of the case.
In either case (tongue.gif), I'm not entirely 100% on that PSU - it would be nice if you could give the exact model though.
You would likely know if the PSU has blown as you should be able to smell it.

There are no screws loose in the PC, nice out of the box answer though wink.gif
The power supply's exact model is a Xigmatek NRP-VC403 (Which I didn't know till today when I took it out to test it.) Also as for the smell, I have a pretty bad cold at the minute, so I can't even smell things like deodorant or taste what I'm eating hahaha.

I'm about to test my PSU, only I genuinely have no paper clips anywhere in the house, so I'm waiting for my mum to bring one home from work.
post #14 of 27
Quote:
Originally Posted by Scott96 View Post

The power supply's exact model is a Xigmatek NRP-VC403 (Which I didn't know till today when I took it out to test it.)

even worse. 27 amps combined on the 12v rails. your psu went poof.
i dont know how many amps the 6850 pulls but xfx recommends a 550 watt. overclocking your cpu killed it.
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w00t
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post #15 of 27
Like others have said, you're overdriving your PSU and you most likely smoked it. Test it to be sure, but don't reinstall it. Look around for a 500 - 600 watt PSU at a reasonable price. Good luck! thumb.gif
post #16 of 27
Don't the fans run off the 12v line? yet they still get enough power to start spinning. So the MB is getting power (assuming the fans aren't directly connected to the PSU).

Taken from Xigma's site:
Quote:
The power supply should provide OCP and should shutdown before 240VA of each output power (included +5V, +3.3V). The power supply should provide OCP when over current output of each output power (included +12V).

http://www.xigmatek.com/product.php?productid=40&type=specification

Perhaps there is a way to reset it?
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Longterm upgrader
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post #17 of 27
Thread Starter 
Okay I tried that Power supply test, and exactly the same thing happens.

Here's a video I've posted on YouTube, it's with only the case fan connected with the paper clip (I was too lazy to take the fan out the PC).

http://www.youtube.com/watch?v=rzkhMZqwvuE&feature=youtu.be

When you here the click in the background, if you didn't guess, that's me turning on my power supply.
post #18 of 27
Thread Starter 
Quote:
Originally Posted by schmotty View Post

Don't the fans run off the 12v line? yet they still get enough power to start spinning. So the MB is getting power (assuming the fans aren't directly connected to the PSU).
Taken from Xigma's site:
http://www.xigmatek.com/product.php?productid=40&type=specification
Perhaps there is a way to reset it?

All the fans that start up, e.g. 1 case fan and the GPU fan are both directly connected to the PSU. The CPU cooler, that draws power from the MB, does not start.
post #19 of 27
total 12v output is 324watts

idle power draw 6850 is 131-132 watts

under full load is 240 watts

a 6100 oc to 4.8ghz draws 200 watts

im guessing at only 4.1ghz it still draws at least 150 watts maybe 175 watts

combined with everything else in his pc, it was too much for a cheap psu to handle. as i stated, look at the 12v rails amp output. 27 amps combined
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w00t
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post #20 of 27
Thread Starter 
Thank you very much to everybody that has helped me! Really means a lot to me to know there are still nice people out there on the internet!

I'm going to order a new power supply, I'm going to get the Corsair TX650 V2, since the graphics card I'm getting at christmas (XFX 7950) recommends 650W.

Thank you so much to all of you, hope I can return the favour some day!

Also heads up to anyone thinking of buying a PC from DinoPC.co.uk in the future, they clearly don't know how much power their PC's are going to use!
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