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I5 2500K 4.4Ghz Stable in prime for 12 hours but booting instable

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April 24, 2011 12:33:12 AM

Greeting

I but a few computer with a OC so I am not new...
I build a new computer with a i5 2500K with a overclock of 4.4Ghz.
I ran a prime and furmark test for 12 hours and it is stable. No problem what so ever on those test.
But sometime when I start the computer it will not boot properly... it start and 5 to 15 sec later shutdown and restart again and 5 to 15 sec shutdown again and restart and shudown and.... you see the picture...

If I unplug the computer and want 10 min and reboot it start ok and tell me that the overclock was unstable...

Anyone else know how to resolve this problem...

Here is my config :

Motherboard : Gigabyte GA-P67-UD3-B3
CPU : i5 2500K
CPU Heat sink : Noctua NH-D14
Ram : 4Go G.Skill Ripjaws X DDR3-1600Mhz
Hard drive : Seagate Barracuda 500Go 7200 RPM
Power supply : Coolermaster Silent Pro 600W Modular Power Supply SLI ATX12V 24PIN Active PFC 2X8PIN PCI-E 135mm Fan

My Vcore is 1.4V
I have the Vdrop enable.
For the rest it is normal.

Any advice...

Thanks you
April 25, 2011 11:59:11 PM

So anyone know what to do???
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a b K Overclocking
April 26, 2011 8:51:39 AM

Does this happen ever without the overclock? If not does it happen @ 4GHz? Please list all settings you have changed to get this overclock.
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April 26, 2011 1:05:01 PM

1.4 Volts sounds awfully high for 4.4Ghz. I have been playing around with this chip for the last couple of days and have managed to achieve 4.4Ghz with as little as 1.31 Volts.

Are you manually setting the voltage or are you leaving it on auto?
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a c 99 à CPUs
a c 231 K Overclocking
April 26, 2011 6:28:13 PM

R4ekwon said:
1.4 Volts sounds awfully high for 4.4Ghz. I have been playing around with this chip for the last couple of days and have managed to achieve 4.4Ghz with as little as 1.31 Volts.

Are you manually setting the voltage or are you leaving it on auto?


I agree! 1.31v should be closer to the voltage needed to run 4.4ghz, 1.40v should have you booting around 47x, or 48x.

Additionally Prime95 is a CPU and Memory stress tester, it doesn't test adding the rest of the system load including Graphics and Sound into the total test bed. Too many are under the delusion P95 is the cure all of testing.

Also do you have a graphics card? You didn't list one?

A 600w power supply can fall short with some GPUs, but that totally depends on what you're running?
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April 26, 2011 10:01:42 PM

You need to update the bios at the gigabyte.com I had the same problem update to f3 bios and it will fix the cycle. That is a very high vcore for 4.4 I can get 4.5ghz to boot with 1.35 vcore. Update your bios!
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April 27, 2011 1:20:33 AM

I run 4.5 with 1.29 vcore.
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April 27, 2011 3:04:32 AM

You run 4.5 with 1.29? What other voltages, etc are you running?

I would update your BIOS for sure.
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April 28, 2011 4:00:32 AM

Hi guy

Ok I will try to update my bios.
Like I said I put 1.4 in the bios... I use vdrop enable.
When I did my stability test I used Prime and furmark at the same time.

Thanks you
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April 28, 2011 10:17:38 AM

Lower your vcore and start testing at 4.5 and raise the vcore one encriment until you are stable I can almost run at 4.9 at that voltage.
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a c 100 K Overclocking
April 28, 2011 3:21:52 PM

Since you manually overclocked and disabled turbo, you should disable Vdroop too!

Vdroop's main advantage is that it can change the voltage going to the CPU under different speeds and active core situations.'

Also you might want to run Memtest86+, could definitely be a memory issue. Intel Burn Test at higher stress settings and Prime95 Blend are also pretty good for testing memory.
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May 2, 2011 4:14:42 PM

Dude the boot problem is the old bios, I've got the same motherboard and I update to bios f3 and it sorted it
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June 17, 2011 1:59:03 PM

Well I got the same board, updated to F4 BIOS and i'm still getting the boot problems...
2500K, running 4.5GHz on 1.35 vcore
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June 18, 2011 6:16:08 AM

Have you monitored the voltages at idle and at load? If not, do this. With low Vdroop the voltages will be higher during load and lower during idle. Maybe the voltages at Idle are too low. You can switch to high vdroop and then you would have higher voltages at idle than during load. You may have to do some more tweaking to get the stress test to work. Your end result will be a very high idle voltage but a decent stress voltage.

You can also try to ENABLE c1e and all those power saving features. Everyone says not to but for me, it made my idle more stable without affecting the stress test. This way will allow you to have low voltage during idle and have the needed voltage for stress. Anyway, if it's not the BIOS then this is all I got.
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June 20, 2011 2:37:35 AM

daship said:
I run 4.5 with 1.29 vcore.



Same here, but with an i7 2600K. 1.296v to be exact. 4.6 requires 1.32
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June 20, 2011 6:01:30 PM

Drazoul said:
Greeting

I but a few computer with a OC so I am not new...
I build a new computer with a i5 2500K with a overclock of 4.4Ghz.
I ran a prime and furmark test for 12 hours and it is stable. No problem what so ever on those test.
But sometime when I start the computer it will not boot properly... it start and 5 to 15 sec later shutdown and restart again and 5 to 15 sec shutdown again and restart and shudown and.... you see the picture...

If I unplug the computer and want 10 min and reboot it start ok and tell me that the overclock was unstable...

Anyone else know how to resolve this problem...

Here is my config :

Motherboard : Gigabyte GA-P67-UD3-B3
CPU : i5 2500K
CPU Heat sink : Noctua NH-D14
Ram : 4Go G.Skill Ripjaws X DDR3-1600Mhz
Hard drive : Seagate Barracuda 500Go 7200 RPM
Power supply : Coolermaster Silent Pro 600W Modular Power Supply SLI ATX12V 24PIN Active PFC 2X8PIN PCI-E 135mm Fan

My Vcore is 1.4V
I have the Vdrop enable.
For the rest it is normal.

Any advice...

Thanks you


Here calculate your PSU capacity. The 600W could be close as a function of what you have and what software run.

http://www.antec.outervision.com/
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