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Voltage/Boot issue

post #1 of 5
Thread Starter 
So, having a bit of trouble with my i5 2500k on the Asus P8Z68-V Pro board.

I tried my first OC on the board the night I built the machine, just went for a low-ball at 4.3GHz. Ran it through intelburn on High, 6 times. Hitting a max of 59degress on one core. Rather happy with it, so I left it at that. Since then, I've tried 4.5 and adapting the voltage to suit but sometimes when the PC boots, fans will spin etc, but the BIOS will fail to boot and it resets and keeps trying until it boots - usually 2 or 3 attempts. I since lowered it back to my 4.3GHz settings and it sometimes does it on that now too. If I leave it at stock clocks it's absolutely fine.

Would I be correct in thinking it's a voltage issue? I know the CPU is stable under the intelburn test at 4.5 at the voltage I was using.

I tried using automatic voltage when clocking to 5GHz at one point, but apparently Asus think that 1.488 is okay. I didn't even try to intelburn that, just instantly rebooted back to my 4.3GHz.

Any direction/advice/help is much appreciated
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Mendeleev
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post #2 of 5
Thread Starter 
Anyone got any ideas, or should this have went elsewhere perhaps?
Mendeleev
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Mendeleev
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post #3 of 5
you should just run ibt for 20-25 times to ensure its fully stable and then try 4.5 ghz and if it doesnt boot up try upping the CPU voltage a little more and try it again and if it boots up do the same thing again until you get to a clock you want

EDIT:run ibt at maximum stress test level dont go really above 1.425v for 24/7 useage also keep an eye on your tempratures
Edited by General_Chris - 8/19/11 at 9:56am
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post #4 of 5
Theres more too it than just cpu voltage. What are your other settings ?
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post #5 of 5
Thread Starter 
Quote:
Originally Posted by Chewy View Post
Theres more too it than just cpu voltage. What are your other settings ?
Following this: http://www.bit-tech.net/hardware/cpu...ore-i5-2500k/3

I went by the recommended limits for everything in that, with the CPU voltage at 1.3v. It still done it @ 4.5GHz. I'm thinking I'll need about 1.330+ to fully stabilize the start up?

As for ibt, when it did boot at 4.3 on auto voltage (which still done the reseting preior to bios problem) it was fully stable on a half hour run of maximum at 60 deg. Which makes me think It's stable enough when it gets going...
Mendeleev
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Bohr
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CPUMotherboardGraphicsRAM
Intel Core i7 4770K Asrock Z87 Extreme4M Asus Direct-CUII HD7970 Patriot Viper Black Mamba 16GB (4x4) 2133MHz 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 840 PRO 512GB SSD Samsung Spinpoint F1 2TB Toshiba 7K3000.D 3TB The cheapest one 
CoolingOSMonitorKeyboard
Corsair H100i Windows 8 Pro Dell U2312HM Razer Black Widow Ultimate 
PowerCaseMouseMouse Pad
XFX Black Edition 750W Modular Corsair 350D Razer Naga Razer Goliathus 
CPUGraphicsRAMHard Drive
Intel Core i7 4702MQ Nvidia GTX 760M 8GB (2x4GB) 1600MHz 128GB Sandisk SSD 
Hard DriveOSMonitorAudio
750GB Samsung HDD Windows 8 Pro 64-Bit 14" 1600x900 panel Crap 
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Mendeleev
(16 items)
 
Bohr
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CPUMotherboardGraphicsRAM
Intel Core i7 4770K Asrock Z87 Extreme4M Asus Direct-CUII HD7970 Patriot Viper Black Mamba 16GB (4x4) 2133MHz 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 840 PRO 512GB SSD Samsung Spinpoint F1 2TB Toshiba 7K3000.D 3TB The cheapest one 
CoolingOSMonitorKeyboard
Corsair H100i Windows 8 Pro Dell U2312HM Razer Black Widow Ultimate 
PowerCaseMouseMouse Pad
XFX Black Edition 750W Modular Corsair 350D Razer Naga Razer Goliathus 
CPUGraphicsRAMHard Drive
Intel Core i7 4702MQ Nvidia GTX 760M 8GB (2x4GB) 1600MHz 128GB Sandisk SSD 
Hard DriveOSMonitorAudio
750GB Samsung HDD Windows 8 Pro 64-Bit 14" 1600x900 panel Crap 
  hide details  
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