Gigabyte GA-Z77X-UD5H Overclocking Issue

[dover_68]

Hello everyone. I picked up a Gigabyte GA-Z77X-UD5H yesterday. When I tried to overclock it today, it just fell flat on its face. I know the motherboard can handle way more than it is. Here are some details:

Hardware:
- Core i5-2500K
- Corsair H60 in Push-pull config
- 8GB (2 x 4GB) Kingston HyperX DDR3 1600MHz RAM
- 1TB Seagate Barracuda
- MSi GTX 560Ti 448
- 750W Rosewill Capstone PSU

Overclocks Tried:
- 4.4GHz, all voltages at auto, LLC at auto Result: Would not boot to windows
- 4.5GHz, 1.28v VCore, all other voltages auto, LLC medium Result: Would not boot to windows
- 4.7GHz, 1.32v VCore, all other voltages auto, LLC high Result: Would not boot into windows

Other Info:
The processor was previously in a Gigabyte GA-Z68AP-D3 mobo overclocked to 4.4GHz with 1.3v VCore and Low LLC.

So any ideas on what the heck is wrong? Am I doing something wrong?

UPDATE: I now have it running at 4.5GHz with a 1.33v Vcore and Turbo LLC. Temps hover around 66-68C with a 30 sec spike to 73C once during an hour of Prime95. Is this relatively normal overclock? I have heard that the UD5H had some issues early on with overclocking the i5-2500K but I thought they were supposed to have been fixed with a BIOS update.

 

[dover_68]

New Info: This morning when I woke up I decided to run Prime95 again. It ran for about 20 minutes then the computer just randomly started turning itself off and rebooting, no BSOD, no errors and temps were not higher than 63C. Any idea what is going on? I can't seem to get a stable OC at all now.

 

[Skotus]

Try watching this video of overclocking on GA-Z77x-UD5H :
http://youtu.be/mBEeXajbG2o

If you aint bored you can read for the whole proccess too at : http://www.overclock3d.net/reviews/cpu_mainboard/gigabyte_z77_overclocking_guide/1

Your problem might be that you need to undercurrent the Vcore in order to lower the temperature