Thank you for contacting Intel Communities.
I would like to know if you have performed a BIOS recovery on your board.
This would be to the latest BIOS version: 0042 at 12/4/2015
Some useful links:
This is first thing I did, I installed board and performed update from 0028 to 0042. Now I think it was a mistake, a big one. This gave me constant reboot with "Eb" post-code.
Then I performed recovery to 0039, this gave me warning message that my CPU is unsupported. Despite this fact, OS is loading. Overall work is unstable, ethernet adapter stops working sometimes, etc. Also, seems like OC settings does not apply.
Then I performed recovery to 0035, warning message disappeared. Not sure about OC settings again.
Another updating to 0042 gave me same issue as at first try.
And with all those BIOSes I've got that sync problem I described. Feels like you playing game with disabled V-Sync, but this effect is even in OS interface. And in games V-sync enabling/disabling haven't changed anything, seems like it's not working at all.
At this moment I switched back to my old board. Not happy about that actually.
Thank you for the information provided.
I would like to provide you with some recommendations when updating your BIOS to the latest version.
1. Perform a recovery to the last known version that was working properly (0035 would be my recommendation).
2. Continue updating to the next BIOS version released. 0036 then 0037/0039 and 0042
3. If you encounter with issues finishing an update, please perform a BIOS recovery to the version that failed and then continue updating.
4. If you continue having issues after updating to 0042, perform a recovery to that version.
Some articles related:
It is important to follow the procedure and not only performing a recovery to the latest version, this would be to make sure the BIOS updates are properly installed in your system.
Please perform the steps above and if the problem persists, do not hesitate to advise me.
@EstebanC_Intel, I'm not the OP, but you have misunderstood the situation.
DH67 and DZ68 boards can have either Sandy Bridge or Ivy Bridge BIOS, but once the latter is installed the former can never be reinstalled. This is reflected in the release notes for these boards. 0028 is the newest Sandy Bridge BIOS and that is what the OP started with. Then he installed a Ivy Bridge BIOS and he was permanently screwed. The problem is and has always been, Intel does not warn of the consequences for moving to Ivy Bridge BIOS. And Intel washed its hands of the boards by not offering a service where customers could have the BIOS reverted back to Sandy Bridge for a reasonable charge. DZ68BC boards are especially problematic because of their OC capability which works well with Sandy Bridge CPUs and Sandy Bridge BIOS, but has severe problems with Sandy Bridge CPUs and Ivy Bridge BIOS.
Here is the exact text from Downloads: "Warning: BIOS version 0035 includes support for 3rd Generation Intel® Core™ processors. Due to structural changes in this BIOS version, once a board has been converted to this version or later, it will no longer be possible to downgrade the BIOS to version 0028 or earlier. Attempting a BIOS downgrade to a previous version may fail – the board BIOS will remain at its current version."
And to be blunt, a number of Intel support personnel have recommended that customers update their BIOS at the first sign of trouble when that course of action is the worst possible for DH67 and DZ68 boards. Not to mention that Intel's website offers this sage advice on Downloads: "Update the BIOS on your computer only if the newer BIOS version specifically solves a problem you have. We do not recommend BIOS updates for computers that do not need it."
If N.Scott.Pearson has a workaround to revert back to Sandy Bridge BIOS on DH67 and DZ68 boards, I would love to hear it. I tried to revert a DH67CL and failed.
Here you can find some instructions when updating the BIOS in your 6th generation Motherboard.
sadpanda do not hesitate to advise me if you need further assistance with this situation.