Thanks Juan.. settings need to be updated for the 1253 bios.. specifically the AI OC to Auto and C states enabled. Below are my stable settings for 4.8Ghz and 5.0Ghz OC's.
1253 BIOS Settings:
AI Tweaker:
AI OC- Auto
Turbo Raito- Per Core
Internal PLL- Enabled
Mem Freq- Per your RAM specs
Load...
I had speed step enabled so I turned on another burn test in the background to display the correct Ghz in CPU-Z once the burn test was completed. It shows my max temps in Real Temp in those screen shots. 5.0Ghz 79C and 4.8Ghz 67C. I too would have a BSOD at 5Ghz at 1.4v and thus needed to bump...
5Ghz @ 1.45v
4.8Ghz @ 1.35v which are my everyday settings
1253 BIOS Settings:
AI Tweaker:
AI OC- Auto
Turbo Raito- Per Core
Internal PLL- Enabled
Mem Freq- Per your RAM specs
Load Line- Ultra High
VRM Freq- Manual
VRM Fixed- 350
Phase- Extreme
Duty- Extreme
CPU Volt- Manual, 4.8Ghz @...
Fixed all my 2600k issues by changing the VRM Freq from Auto to 350 on my Asus P8P67 Deluxe. Some quick tests showed stable on 1.35v @ 4.8Ghz and 1.47v @ 5.0Ghz. Previous to this change I could not boot into windows above 4.5.
This little VRM Frequency setting just changed my world! I had all the other settings already and could not boot in above 4.5GHz to save my life. Just the change of the VRM to 350 allowed me to hit 5.0GHz with a stable Intel burn in test. Had to bump my CPU to 1.475, max temp hit 78C. Thanks...
Make sure you install the "Intel Rapid Storage Technology driver software V10.0.0.1046 for Windows 32/64bit XP/Vista 32bit/Vista 64bit/Win7 32bit/Win7 64bit--(WHQL)" Link That driver alone changed my Windows user experience for hard drive performance from 5.8 to 7.7 for my SSD.