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Gigabyte Z77X-UD3H Motherboard starts when it feels like it.

post #1 of 3
Thread Starter 
Hello overclock.net, long time reader, first time poster.

I'm currently having a minor issue with my desktop rig that I was curious if someone could lend me a hand with. First things first, I wanted to post up my Specs

Intel i5-2500k CPU
Gigabyte GA-Z77X-UD3H motherboard with F17 BIOS (latest)
16 GB GSkill [ RipjawsZ ] F3-2133C11D-16GZL DDR3-2133 MHz (PC3-17000) (2X8GB)
Gigabyte GV-N670OC-2GD GTX 670 Video Card
Antec EA-750 750W Power Supply
Antec Kuhler 620 with 2 Coolermaster Excalibur fans and 2 additional Excalibur fans in the front of the case.

So here's what is baffling me. I'm currently running at 4.6Ghz with 1.32 V and no overclocking on the video card. Sometimes when I start the system, I start booting, then the Gigabyte UEFI bios screen will flash, the system will reboots, and this can become a vicious cycle. After this happens, sometimes the system will tell me something's wrong and try to reset to default values and sometimes it will boot. Here's the catch though, if I reload the exact same profile after this cycle then the system will boot 100% of the time. Also, when the system is up and running it is fully stables. I've ran Prime95 for well over 24 hours and CPU temp will read max temp around 67C, but most of the time it hovers between 58 and 64C under full load.

I've tried upping the voltage slightly (it was originally 1.3V with no issues after booting), but still the same thing occurs. Any idea what can be causing this? Also, I'm running RAM as just the default XMP profile which detects all the voltages correctly.

Any help with this would be greatly appreciated. It's not really a huge deal since the system runs fantastic when up, but I just figured some of you more experienced in overclocking might be able to give me some guidance. If you need any additional settings from anywhere I'll be more than happy to provide them.

Thanks in advance!
Edited by bx1018 - 9/25/12 at 4:00pm
post #2 of 3
The One million dollar question here is: Does it happen with the CPU running at stock speeds?
post #3 of 3
Thread Starter 
Thanks for your reply Alfaa. It does not happen at stock speeds. When I initially built the system, I had it stock with everything at auto and this problem never occurred. If you need any other info, just let me know.
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