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The computer restarts once during a boot-up

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October 9, 2011 4:31:18 PM

Hi,

I recently built a PC and I'm randomly getting a weird problem during a boot-up.
The computer works perfectly fine, and here's a discussion regarding my system's temperature I posted yesterday: http://www.tomshardware.com/forum/315411-28-2600k-5ghz-...
The temperature isn't good, but it's concluded that it isn't that bad. Plus, the highest temperature was reached through prime95 so the PC wouldn't hit that high in normal usages.

The system would never lock-up, restart or produce BSOD.
The problem is when I start the computer, before anything even shows up in the monitor (no signal) the computer would shutdown, as I can hear every fan stopping momentarily, and then restart again normally.
Again, this happens randomly as far as I know. I woke up this morning and encountered this problem again.

It's so random that I can't figure out why this is happening.

Here are my specs:

i7 2600K @4.5GHz 1.35v
Hyper 212+
Asus P8P67 Pro Rev 3.1
GeForce 560 GTX Ti Twin Frozr II
Antec Earthwatts Green 650W

More about : computer restarts boot

October 9, 2011 4:36:34 PM

You haven't mentioned your motherboard, but i have the same aswell with my Asus board and I5 2500K. It seems to be wether or not it can succesfuly apply the overclock at 1st boot or not.
a b B Homebuilt system
October 9, 2011 4:37:40 PM

Try re moving your overclock (set the speed to auto) and monitor what happens over a period of time. It could be that your bios is not liking that much of an overclock
Related resources
October 9, 2011 5:29:29 PM

Sorry, I forgot about it. It's Asus P8P67 Pro Rev 3.1

I've seen a lot of people successfully overclocking with the same settings.
Is there anything I can do to fix this?
October 9, 2011 6:16:25 PM

abekl said:
Try re moving your overclock (set the speed to auto) and monitor what happens over a period of time. It could be that your bios is not liking that much of an overclock


+1

Also what you can do to make sure that you have a good overclock is that you might want to enable the load line Calibration, then leave the CPU Voltage and QPI Voltages, Memory, ETC on Auto and restart the computer, after the restart go to BIOS and see the value on the CPU, QPI, Memory, ETC, Bios should give you a 95% correct voltage calculation. Look at them and then set your voltage to those voltage settings, (NOTE: you might want to over voltage just a bit to make sure stability) ---> this is why I said 95% correct voltage---you will add in the 5% by over voltage because the system is on Idle and by you providing the 5% over voltage the system should be fine on full load.
Make sure run Prime95
October 9, 2011 9:05:22 PM

My BIOS says the voltage is around 1.32, that's why i decided to go for 1.35.
Can you explain what a "correct" overclocking is?

I think I've done everything right, but I can't seem to know what's the cause.

I mean, I can use my computer just fine, but it just happens.
I can also run Prime95 without a trouble meaning overclocking be at least fine.
October 9, 2011 9:43:49 PM

vencent said:
My BIOS says the voltage is around 1.32, that's why i decided to go for 1.35.
Can you explain what a "correct" overclocking is?

I think I've done everything right, but I can't seem to know what's the cause.

I mean, I can use my computer just fine, but it just happens.
I can also run Prime95 without a trouble meaning overclocking be at least fine.


make sure all wires and Molex cables and Power is connected correctly. To ensure there isn't any shortage.
and I will get back to you with another answer soon, it can be a number of things
October 9, 2011 9:55:14 PM

vencent said:
My BIOS says the voltage is around 1.32, that's why i decided to go for 1.35.
Can you explain what a "correct" overclocking is?

I think I've done everything right, but I can't seem to know what's the cause.

I mean, I can use my computer just fine, but it just happens.
I can also run Prime95 without a trouble meaning overclocking be at least fine.


Hmm, make sure you update the BIOS, have you apply the thermal grease carefully and correct? Make sure the heatsink is on very good.
Check your memory as well and make sure the sticks are in correctly as well and compatible. Always used an Anti-Static wrist band with taking hardware in and out from the computer. Please ensure that the PSU isn't failing after loads when first booting up. Hope you are using the right SATA cable for the motherboard to the HDD or SSD.

Tested everything will take time but the MB isn't very much in disagreement with something in your system or BIOS
October 9, 2011 10:06:02 PM

Quote:
Ideally you want to be aiming for a maximum temp between 60-70c on full load.


+1
a b B Homebuilt system
October 9, 2011 11:32:15 PM

This is a problem with the ASUS p8p67 boards. Mine did it for a couple of weeks, but once I got all the settings in place so it was not having to auto detect hardware, it stopped doing it. They say the latest BIOS was supposed to fix it, but it had no effect on mine.
October 9, 2011 11:34:29 PM

jitpublisher said:
This is a problem with the ASUS p8p67 boards. Mine did it for a couple of weeks, but once I got all the settings in place so it was not having to auto detect hardware, it stopped doing it. They say the latest BIOS was supposed to fix it, but it had no effect on mine.


Can you tell me what you did to fix it?
I feel a lot safer now. Please help me with this too. :) 
October 9, 2011 11:36:20 PM

Disable PLL Overvoltage in your BIOS. Most Asus P67/Z68 mobos do that if that setting is on. Mine did.
!