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Z68X-UD4 Overclock Boot Issues

post #1 of 6
Thread Starter 
After reading several reference guides about sandy bridge overclocking, I thought I would see how well my new system would fare. I've run into an issue where whenever I try booting with an unstable overclock, the system hangs on the POST screen, shuts off, and restarts indefinitely(or at least until I shut power off, open up my case, and clear CMOS).

It does this whenever I try going past x47 multiplier or when I'm trying to figure out the most conservative voltage settings for my overclock. I've currently stopped trying to take my overclock any higher after the clear CMOS jumper didn't work. It acted like it wasn't going to do anything even after pulling and reinstalling the battery too, I felt sick because it sat there with power on and black screen for probably 20 seconds before it finally did anything. It did finally POST and let me into the BIOS settings.

I was at 4.5GHZ @ 1.344v but got BSOD and dropped it down to my current setting. This situation has killed my motivation to try any further adjustments for fear of damaging my new hardware. I'm currently sitting at a very disappointing 4.4GHz at 1.284V under load.

I've already tried flashing the BIOS to the newest F6 BIOS from gigabyte and it made no difference. I'm curious if anyone else has run into similar overclocking boot issues. My 4 year old EVGA 680i SLI board will automatically revert to default speeds and voltages if it has a bad overclock, so this seems very inconvenient for a brand new board(especially for $210). I feel like all this CMOS jumpering and battery removal is just asking for motherboard failure. Any input or suggestions are greatly appreciated.
post #2 of 6
you can try upto 1.55v, but just for trying, don't load your CPU with that much voltage on air.
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post #3 of 6
Ran into this. Updated to the F4 bios and it works better. Now if the OC fails it tries to boot twice and then auto clears cmos

Had this problem both on my P67-UD4 and my MSI p67-G45
    
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post #4 of 6
I have a UD 5 and it's is running very well at 4.9 with the voltage set at 1.40 and llc set to 6. Temps are 70-71 in Prime 95 with a Silver Arrow.
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post #5 of 6
You need to update to the latest bios.
After you do this, you need to flash the backup BIOS so it matches the main BIOS. This is easily done by holding ALT F12 right before you see the CPU ID string appear at the beginning of POST. Make sure quick boot is disabled before trying that.

This should make the board recover properly from any failed overclocks.

BTW, X47 is your highest multiplier/mhz available (4700 mhz +50 mhz) that you can do with PLL overvoltage disabled. Your CPU is a X52 chip; you should be able to get 5 higher multipliers up to 5200 mhz by enabling Internal PLL Overvoltage. Note that this has nothing to do with the CPU PLL Voltage, however.
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post #6 of 6
sry post in wrong thread
Edited by beetlespin - 5/29/11 at 11:20pm
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