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Windows 7: Crashing/Restarting - Error 41 - No BSOD - New Build

28 Mar 2012   #31

Microsoft Community Contributor Award Recipient

Windows 7 Ult x64 - SP1/ Windows 8 Pro x64

Yes, change the 'CPU Vcore' to 'Normal', this will enable the 'Dynamic Vcore(DVID)' (Page #43&44 in your motherboard manual).
Dynamic Vcore will add/reduce voltage to the Vcore and allow the OS to change it for Stepping and other features. When you manually set Vcore it will remain at that voltage setting regardless of other functions settings. Much better to use Dynamic Vcore for CPU voltage setting adjustments.

increase the CVID by +0.010 untill stable?
Yes, this is a best way to get it stable, some people are impatient so the 0.05v and then reduce by 0.010v until un-stable and bump up 0.010v works better for them.

If the system boots into Win7, test with one of the CPU testing apps.
CPU - Stress Test with Prime95
Be sure to monitor CPU temperatures, don't go over 77.6C.
Open Prime95 and stop the test if it is running, in Advanced tab select 'Round off checking', in the Options tab select 'Torture Test...', in the window that opens select 'Blend', after 'Number of torture test threads to run' enter 4, then click OK to start the test.
Run Prime95 for two hours, this will be enough for this stage of testing.

After the above adjustments are finished and stable.
We can adjust the VTT and DRAM voltages/settings.
The Intel rule for VTT and DRAM voltages is to have DRAM 0.50v(or less) above the VTT. This is to prevent damage to the IMC (CPU Integrated Memory Controller), this is well documented.

Check the 'Command Rate' setting for the RAM, should be 2T. If not then change it.
EDIT: The previous CPUZ Memory tab shows it is set to 2T already, check it and confirm.

Set the VTT manually to 1.120v.
Set the DRAM manually to 1.500v.
Check for stability, if it boots up with no issues then run memtest86+ for 7 full passes, best to run overnight.
You can stop the test if you get any errors, one is too many.

If these settings fail to boot or won't pass memtest86+, then bump the DRAM voltage to 1.550v and test again.

As mentioned by MiTr, it's a good idea to check for bent CPU pins.

My System SpecsSystem Spec
29 Mar 2012   #32

Windows 7 Home Premium 64bit

What do you suggest the max VCID should be. Like if its still crashing where should I stop going higher.
My System SpecsSystem Spec
29 Mar 2012   #33

Windows 7 Home Premium 64bit

After reaching +0.400v CVID and my VCore peaking at 1.6v while still crashing. I decided to RMA. I will check for bent pins right now.
My System SpecsSystem Spec

31 Mar 2012   #34

Microsoft Community Contributor Award Recipient

Windows 7 Ult x64 - SP1/ Windows 8 Pro x64

The DVID limit should be +0.05v, as I posted previously, if the CPU is the cause a max voltage of 1.40v would be as far as I would go for testing. Wouldn't run it that high for every day use.
1.60v is too high, possibility of causing damage.

What is the full load CPU voltage at 0.00 DVID?

Let us know if you found any bent pins.
My System SpecsSystem Spec
31 Mar 2012   #35

Windows 7 Home Premium 64bit

New CPU will be here on monday. I will check for bent bins and test the new one.

My System SpecsSystem Spec
01 Apr 2012   #36

Microsoft Community Contributor Award Recipient

Windows 7 Ult x64 - SP1/ Windows 8 Pro x64

Let us know how it's running.
My System SpecsSystem Spec

 Crashing/Restarting - Error 41 - No BSOD - New Build

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