Gigabyte z68-ud3-b3 boot loop

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Benjamin_22

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Feb 7, 2016
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I foolishly tried messing with bios settings today, and got stuck in a boot loop.

First, I accidentally enabled Ultra Fast Boot, which disabled the bios, finally got back to the bios fixed it.

Then I wanted to overclock because ppl make it sound so easy on forums like this. I thought that changing the "multiplier" up to 40 would be a safe automatic way. I did that, and the computer was slowly responding after boot.

I then decided to go back to optimized defaults, which I did, then restored the "multiplier" back to 33.

So I thought I was back to the default, but it got stuck in a boot loop now. Tried to clear the CMOS with jumper, and removing the battery. Both did not work.

I'm running on the latest UEFI bios, but it's weird because it keeps flashing the old boot screen for the bios so I'm not sure what happened.

i5-2500k
Coolmaster 212
HD 6850
Ram...
z68x-ud3-b3
 
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Benjamin_22

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Feb 7, 2016
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So it keeps getting shorter now that I've looped it 50+ times. Assuming from the guide I have some "thermal shutdown" activating... Looking at the CPU fan, it starts then stops after boot. Then it loops shortly after.

'Thermally induced' boot loops - this syndrome is seen when the board appears to boot OK, completes POST (usually) and gives the single "I'm good" beep, but before it can load the OS, and without a 'powered down' interval between, resets and POSTs again. These 'loops' may get closer (shorter) each time, until the system is never actually finishing POST. This usually indicates a problem with the CPU's ability to 'dump' heat to the HSF (heat-sink/fan assembly) - the processor is repeatedly going into 'thermal shutdown'! For this set of symptoms, you need to first examine your HSF installation; an 'unseated' locking pin, or a cracked one, will cause this, as will a non-functional fan (defective, or not plugged in correctly), or poor application of thermal paste. You will likely need to remove your board from the case to examine the locking pins carefully...
 
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Benjamin_22

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Feb 7, 2016
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Okay i'll try as many as a I can. It was working fine before I just changed a few cpu settings. I ran it only a couple minutes on those settings. I don't know what's going on now.
 
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Benjamin_22

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Feb 7, 2016
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So after resetting the battery overnight, I now get a post beep! I see the boot logo, but not much happens after that before looping again. If i try to enter the bios, I get a blank screen and a loop shortly after.

 
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Benjamin_22

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Feb 7, 2016
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I can't get it to load OS or go into bios, but i've gotten the post beep a few times. Either this motherboard just crapped out on me, or I'm out an expensive CPU. Which one is it?
 
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Benjamin_22

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Feb 7, 2016
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I clean the CPU, reattached it, unplugged everything not necessary, started it up with no ram. It beeps for RAM. I add ram, and it keeps looping. I can't access bios at all. It will post-beep eventually with bios screen. I think the motherboard got corrupted somehow.

When I was trying to disable the ultrafast boot, I downloaded Gigabyte App Center because that was one way to turn it off. But the UEFI bios download page says that some utilities are not compatible. Wonder if that did anything.

I've looked at other overclocking tutorials to double check what I did to screw it up, and I only changed the clock ratio, which should have not been life-threatening. I believe there was an older backup bios that should be loaded on the motherboard now. Otherwise I need a testing motherboard or cpu.
 
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