Re: GZ-Z77X-UD5H Random freezing and shutdowns.
I made sure to load optimized bios defaults after I flashed my BIOS to F8, so I guess my BIOS has everything set to stock.
This was my first assumption when I stumbled across this thread; It was this post in particular that I found whilst searching for a solution:

Originally Posted by
Krysaenaar
Wazza,
I am atheos on the OcUK forums.
Thanks for the advice you gave man.
Just if people come across this thread from a google search i better repeat what i said there.
Hey wazza,
It always locks up when gaming (BF3 / Arma 2).
It happens about once in every 8 to 10 hours of gaming so maybe once every 3 days.
Everything is at stock apart from the RAM voltage which i set at 1.50v and of course BCLK to 101 now.
And you replied with
Originally Posted by wazza300 View Post
if its in gaming its usually not enough dram or qpi/vtt
for dram id use atleast 1.55v,im running that much with my samsung green
and qpi/vtt id up it from stock 1.05v to 1.10v and test with gaming again,if same thing try 1.12v qpi/vtt,you can safely use upto 1.2v but you shouldnt need that much
That sounds similar to my situation so, I tried changing the settings in the BIOS to the best of my knowledge.
I increased the dram to 1.55v and the qpi/vtt from stock 1.05v to 1.10v, but my system wouldn't even boot. It just kept power booting and failing, so I reverted back to "optimized defaults" and here I am back at square one.
Maybe I did something wrong, to be honest I don't know jack about overclocking at the moment. I chose these parts for the opportunity of OC'ing as I learn. So, would anyone be able to point me towards a brush-up guide on OC'ing so I can figure this out.
Motherboard: Gigabyte Z77X-UD5H (F8) | CPU: i7-3770K | RAM: CORSAIR Vengeance (Low-Profile) 16GB (2 x 8GB) (CML16GX3M2A1600C10) | GPU: Asus 670 GTX Direct CUII TOP | SSD: Mushkin Enhanced Chronos 120GB | HDD: SAMSUNG Spinpoint F3 1TB | Optical: Lite-On iHAS424-98 | Cooler: Corsair H100 | PSU: Corsair HX Professional 850w | Case: Corsair Carbide 500R | OS: Windows 7 Professional SP1 x64
Keyboard: Logitech G510 | Mouse: Logitech G9x | Sound: SteelSeries Siberia USB soundcard
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