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I recently build a new pc and it was working fine. i have an i5 4670k overclocked at 4.2 ghz at standard vcore voltage. i have had it at 4.4 ghz with vcore voltage at 1.250 V but performance improvement was minor so i set it back to 4.2 ghz. but when i was gaming today my pc promptly stopped working. the screen went black and it didnt even shut down properply, it just stopped immediatly. When i tried powering it back on again it did nothing. 

Does anyone of you know what could be wrong? did i kill my cpu by overclocking?

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Can you still get into the bios?

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Are you able to get to the BIOS? or does it crash in windows and are you doing anything when it crashes?

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it doesnt do anything, not even show a screen or spin a fan. it just doesnt respond to the power button at all

 

If not check your PSU cables, as well as the frontpanel cables.

 

Remove and re-install the CPU, RAM and GPU if it is not working, still.

Reduce > Reuse > Recycle

 

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my guess is that you killed the mobo, I don't the Asrock H87 pro4 is all that good for OC'ing. Next guess would be the power supply is broken, but I can't see you using so much power with that system that it would fail. What could you have even been drawing over 300W? 

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turn it off at your power supply and leave it for a good few hours. (maybe even a whole day

Funnily enough my pc didn't want to start the other day either (nothing happened when I pushed the button, headset speakers didn't light up).

 

No power would go through the motherboard, I tested my PSU by jump starting it and it was working but having plugged into my motherboard would not allow the psu to turn on.

Was going to RMA the motherboard but I waited a day with it disconnected from the power.

The next day it started working =]

 

So maybe try that.

    CPU: 3930k  @ stock                                  RAM: 32GB RipjawsZ @ 2133Mhz       Cooling: Custom Loop
MOBO: AsRock x79 Extreme9                      SSD: 240GB Vertex 3 (OS)                     Case: HAF XB                     LG 34um95 + Ergotron MX Arm Mount - Dual Review
  GPUs: Gigabyte GTX 670 SLI                     HDD: 1TB WD Black                                PSU: Corsair AX 860                               Beyerdynamic - Custom One Pro Review

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Some PSU's will auto shutoff if they get to hot. Is the ventilation in your case good? Silly question, but have you checked to make sure the AC cord is plugged in both on the power supply and the wall all the way?

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i left it off for a couple of hours, still doesnt do anything so the psu wasnt overheated and the gpu led stil burns so that is not the problem. Could it be the cpu? or did my mobo just break?

 

Some PSU's will auto shutoff if they get to hot. Is the ventilation in your case good? Silly question, but have you checked to make sure the AC cord is plugged in both on the power supply and the wall all the way?

 

 

"PSU is K.I.A"

Being realistic it could of been but try what @Hoppa said

 

 

turn it off at your power supply and leave it for a good few hours. (maybe even a whole day

Funnily enough my pc didn't want to start the other day either (nothing happened when I pushed the button, headset speakers didn't light up).

 

No power would go through the motherboard, I tested my PSU by jump starting it and it was working but having plugged into my motherboard would not allow the psu to turn on.

Was going to RMA the motherboard but I waited a day with it disconnected from the power.

The next day it started working =]

 

So maybe try that.

 

 

Maybe your PSU was killed in action?

 

 

If not check your PSU cables, as well as the frontpanel cables.

 

Remove and re-install the CPU, RAM and GPU if it is not working, still.

 

 

is there any power leds

 

 

Do any LEDs light up on your motherboard? I would just rebuild it.

 

 

my guess is that you killed the mobo, I don't the Asrock H87 pro4 is all that good for OC'ing. Next guess would be the power supply is broken, but I can't see you using so much power with that system that it would fail. What could you have even been drawing over 300W? 

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i left it off for a couple of hours, still doesnt do anything so the psu wasnt overheated and the gpu led stil burns so that is not the problem. Could it be the cpu? or did my mobo just break?

Unplug everything from the PSU.

Jump start it by putting a paper clip in the connector where a green and black cable goes.

Have a fan connected to the psu or something to test if it works.

 

It could be the mobo though.

 

EDIT: do you have a reset bios button? push that if you do.

If not take cmos out for 10 min then put back in.

    CPU: 3930k  @ stock                                  RAM: 32GB RipjawsZ @ 2133Mhz       Cooling: Custom Loop
MOBO: AsRock x79 Extreme9                      SSD: 240GB Vertex 3 (OS)                     Case: HAF XB                     LG 34um95 + Ergotron MX Arm Mount - Dual Review
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thats the problem your gpu is burning its not the light  :D

on topic check all wires and could be your mobo ram doesnt stop pc from powering (i dont think so anyway) soooo

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Unplug everything from the PSU.

Jump start it by putting a paper clip in the connector where a green and black cable goes.

Have a fan connected to the psu or something to test if it works.

 

It could be the mobo though.

 

EDIT: do you have a reset bios button? push that if you do.

If not take cmos out for 10 min then put back in.

i dont have a reset button but i can clear cmos. if i do, i will lose my overclocking settings but wil i also lose my raid settings?

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i dont have a reset button but i can clear cmos. if i do, i will lose my overclocking settings but wil i also lose my raid settings?

It won't ruin your raid array because i think it's separate. But it will probably turn off the RAID function. So if you reset the bios you will have to turn RAID back on.

    CPU: 3930k  @ stock                                  RAM: 32GB RipjawsZ @ 2133Mhz       Cooling: Custom Loop
MOBO: AsRock x79 Extreme9                      SSD: 240GB Vertex 3 (OS)                     Case: HAF XB                     LG 34um95 + Ergotron MX Arm Mount - Dual Review
  GPUs: Gigabyte GTX 670 SLI                     HDD: 1TB WD Black                                PSU: Corsair AX 860                               Beyerdynamic - Custom One Pro Review

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It won't ruin your raid array because i think it's separate. But it will probably turn off the RAID function. So if you reset the bios you will have to turn RAID back on.

if it does ruin my raid array, is there anyway to set them in raid again without having to format them?

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if it does ruin my raid array, is there anyway to set them in raid again without having to format them?

Yeah, by turning RAID back on in your bios it will detect that there's a RAID array and you'll be all good.

Here's conformation from other people who have reset their BIOS. http://www.overclock.net/t/669857/does-a-cmos-reset-destroy-the-raid-array

    CPU: 3930k  @ stock                                  RAM: 32GB RipjawsZ @ 2133Mhz       Cooling: Custom Loop
MOBO: AsRock x79 Extreme9                      SSD: 240GB Vertex 3 (OS)                     Case: HAF XB                     LG 34um95 + Ergotron MX Arm Mount - Dual Review
  GPUs: Gigabyte GTX 670 SLI                     HDD: 1TB WD Black                                PSU: Corsair AX 860                               Beyerdynamic - Custom One Pro Review

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