I just build a new system with an Intel Core i5-2500k and an Asus P8Z68-V PRO motherboard. However, I am having trouble booting. The system will reboot itself several times on startup, and then say "overclocking failed!"
I went into the Advanced BIOS menu and I saw the following:
"Target CPU Speed 4326 MHz, Target DRAM Speed 1372 Mhz".
Ai Overclock Tuner was set to Manual
BLCK set to 103
Turbo Ratio set to 42.
I tried resetting the Ai Overlock Tuner to AUTO, but after rebooting it set itself back to the setting above.
I am not planning on overclocking this system. How do I set the system so that it stays in a non-overclocked state? What BCLK and Turbo Ratio do I input?
1.200v is the default. The Auto setting usually over-volts to keep stable.
I have the same problem with a similar rig (2500k + same MB). I solved it temporarily by simply switching from advanced to ez mode in bios. Then you get 3 options on the first "page", "silent/energy saving", "normal" and "performance". I just chose "normal", and my system started booting without problem, with the cpu running @ 3,3Ghz.
my guess is that the "auto OC" feature needs a bit tweeking, perhaps it doesnt provide enough voltage to the cpu for 4,3Ghz (which is my auto-oc clock).
I'm confident its easy to reach those 4,3Ghz with a stable manual OC where you can trial n' error adjust the vCore properly.
Go to page 2-16 of your manuel and TURN OFF your TPU switch. That will fix your problem I bet. It should be turned off origanally but I bet it got flipped during your install. It is a manuel way to turn on AUTO overclocking!
Yeah, the manual actually had the ON and OFF positions for the TPU switch reversed, so I thought it was disabled when it was enabled. Once I turned the TPU switch off on the motherboard, that fixed the issue.