intel extreme tuning utility unable to start

The OC Tweaker screen is not the only place where settings are modified for an OC. Then go through the various UEFI screens, including CPU Configuration in the Advanced screen, and see what has changed. To give you a better perspective on the difference between IXTU and a UEFI OC, try loading one of the built in, automatic OC profiles in the UEFI. The few options we change are not all that is going on in the control of the CPU, memory, etc. There are many underlying UEFI settings that are not available to the user that interact with the ones we can change. I don't have an absolute perfect explanation why this happens. I'm simply attempting to explain why what we experienced is happening. As I said, I have experienced this myself with my X99 board and using IXTU. Why would that (for example) cause a startup to fail, but not a stress test?įrankly, I can see both sides of this debate. For example, your Load Line Calibration setting is Level 5, the lowest compensation level. Having said all this, it could be argued that there should be no difference when stress testing in the OS, and starting the OS. The terms for them are 'initial' and 'eventual', initial being the voltage in the pre-OS environment, and eventual being the voltage in the OS environment.

Some boards made for extreme over clocking have multiple voltage settings for one specific thing, such as DRAM voltage. When the PC startup environment ends and the OS environment begins, the load on the CPU changes, and that is when the freezes occur. The 5th Gen HEDT processors like your i7-5820K, tend to be less stable when C1E is active. The processor power saving features, SpeedStep, and C States, are not active. There is no OS to distribute processes across multiple cores and threads.ĭid you ever check the VCore in the H/W Monitor screen? Much lower than the VCore voltage setting, since one core does not need as much voltage.

When the PC is starting, performing POST, or in the UEFI UI, the CPU is using one core.

The same thing is true when we are using the UEFI/BIOS UI.

The short answer is the environment the CPU/system is operating in during a POST and startup is not the same as the environment the CPU/system is operating in when the OS/Windows is running. I've experienced the same thing on my X99 board, using IXTU to set an OC and then attempting to duplicate it in the UEFI/BIOS, which then fails on the restart.

Intel extreme tuning utility unable to start