Need some help OC i7 4770K

Overclocking Issue i7 4770k & Asus Maximus VI Formula
Need some OC advise!
Hi all,

I currently own a 4 days old :
i7 4770K (FAN: Noctua D14)
Asus Maximus VI Formula (Bios 0804)
Crucial Ballistix Tactical BLT2C8G3D1608ET3LX0CEU (2x8GB)

Trying to do OC results and followed the video on YT by ASUS (http://www.youtube.com/watch?v=Z7zPu9255ZI & http://www.youtube.com/watch?v=4Pilo1E6kXQ)
4.3GHz - 1.185v (Stable 12 hours Prime95 test)
4.4GHz - 1.2-1.3 (Unstable, no bluescreen, but system freezes as soon as i run Prime95 for 2 minutes!)
4.5GHz - 1.25-1.31 (Unstable, system freezes as soon as i run Prime95)

EUFI settings changed for 4.3GHz OC
AI Overclock Tuner -> Manual
Core Ration Limit -> 43
Min CPU Cache Ratio -> 43
Max CPU Cache Ratio -> 43
CPU Core Voltage -> 1.185v

NOT STABLE: EUFI settings changed for 4.4GHz OC
AI Overclock Tuner -> Manual
Core Ration Limit -> 44
Min CPU Cache Ratio -> 44
Max CPU Cache Ratio -> 44
CPU Core Voltage -> 1.2v up to 1.3v

NOT STABLE: EUFI settings changed for 4.5GHz OC
AI Overclock Tuner -> Manual
Core Ration Limit -> 45
Min CPU Cache Ratio -> 45
Max CPU Cache Ratio -> 45
CPU Core Voltage -> 1.25v up to 1.31v

I guess 4.3GHz seems to be the limit, don't wanna go over 1.3v without custom watercooling.
Any advise is welcome!

Hi Yogi,

Thanks alot i will try this tonight!

I also purchased a 4770K about a week ago paired with an ASUS MAXIMUS VI HERO. I've been stuck at 4.3GHz and can not seem to get anything stable at 4.4. Below are my stable 4.3 settings. I think I can get it stable at a lower voltage, but this is where I was messing around. I've tried a core ratio of 44 (1.3v) and cache max of 35 (1.2v) and still can't get it stable. It boots and OS is functional, but AIDA64 blue screens after a few minutes very time. I do change my AI Overclock Tuner to Adaptive once I am done benching. This way it changes the voltage as needed. It runs 28-30C idle this way. That is stable as well.

EUFI STABLE settings:
AI Overclock Tuner -> Manual
Core Ration Limit -> 43
Min CPU Cache Ratio -> AUTO
Max CPU Cache Ratio -> 43
CPU Core Voltage -> 1.250v
Cache Voltage ->AUTO

I've done a lot of reading and Hasewell really seems to be the luck of the draw as it comes to overclocking ability. There are a few YouTube videos out there that have tested the same hardware with different chips and they all clock in differently. One had a batch of 4 that all did 4.3 and others did something between 4.5-4.7. All on the same system. Who knows, if you got yours from Newegg, maybe they were off the same batch or wafer or something. Not to say that really has anything to do with it, but it sounds good in my head.

Thought I would just chime in on this to give my recent account. I am happy at 4.3. Its solid as a rock and I've logged several hours consistently gaming on it with it. I may try and lower my voltage to see if I can run a little cooler. at 4.3 (1.25v) I run AIDA64 around 80-mid 80C, with the occasional peak of 86-87C. Gaming it runs up to maybe 70C or so on BF3 and Tomb Raider. My GPU maintained it's old OC as well with the new board. I came from a 1st gen i7-920 @ 4.0GHz. It seems that this system is squeezing out a few extra FPS, but I wanted to upgrade for other features and just to get on the new platform.

I will mess around with mine some more and share any advances I get since it seems that we are in the same boat.