9 Replies Latest reply on Aug 17, 2011 5:54 AM by BacWooZ

    Intel DZ68DB and i7-2600K


      I've run into some issues with this new board.  I would like some help with the community to confirm this is a BIOS/firmware issue and not an issue with my specific hardware installation.  Please help me out if you have a system with a similar configuration.  This is what I am facing...


      a) The BIOS splash screen does not appear when manually setting the BIOS video settings.  Only the splash screen is missing as Windows 7 displays it's splash screen and desktop without issue.

      b) The default CPU fan control settings seem excessive.

      c) The standby LED (on the motherboard by the SATA connectors) remains partially illuminated when the power is disconnected and a monitor is plugged in to the motherboard port.


      I've tried all BIOS versions up to and including 0027.  No PCI cards are installed in the system.  The system works perfectly with exception of the above issues.


      Please try the following...

      1) Write down your current BIOS settings.

      2) Go into the BIOS settings and load the default BIOS values using the F9 key.  Change any BIOS settings required for your system to start up correctly with exception to the CPU fan control settings and Video settings.

      3) Examine the CPU fan control settings.  Note the values in the Proposed and Default columns for Over-Temperature Threshold, Control Temperature, and All-On Temperature settings.

      4) Examine the Video options.  Change the Primary Video Adapter to <Auto> and the IDG Primary Video Port to the internal port where your video display is connected.  For example, the IDG Primary Video Port should be set to "DVI-I (Blue) Digital" if the internal port is connected to a DVI monitor.

      5) Save the BIOS settings and reboot the system.  Note if the BIOS splash screen appears.  The BIOS splash screen should be blue with Intel on it and options F-key startup options (I think these were F9, F7, and F2)

      6) Allow the system to boot to the OS and then shut down the system normally.

      7) Open the case and note the intensity of the STDBY LED (by the SATA connectors).

      8) Disconnect the power.  Ensure that the monitor (HDMI or DVI) remains connected and powered on.

      9) Note the intensity of the STDBY LED and comare with what was seen in 7.


      You will find that you will no longer be able to change the BIOS settings if the splash screen does not show because you are driving blindly.  To fix this follow these steps:

      1) Power down the system.

      2) Change the BIOS configuration jumper (yellow jumper above the STDBY LED) from RUN (jumper on pins 1 & 2)  to CONFIGURE (jumper on pins 2 & 3).

      3) Power back on the system.

      4) The system should display the splash screen and then go into the BIOS configuration automatically.

      5) Change the IDG Primary Video Port to <Auto>.

      6) Exit the BIOS.  The system will prompt you to power down the system and return the BIOS configuration juumper to RUN.  Do as instructed.

      7) The system should now start normally with the BIOS splash screen showing when the system starts up.


      Thanks for your help!

        • 1. Re: Intel DZ68DB and i7-2600K

          Hello, rsnelson; thank you for taking the time to report this issue.


          The fact that the motherboard LED remains partially illuminated, could be a sign of the root cause of the problem; as there shouldn't be any lights if there is no power to the motherboard.


          To try to narrow the problem down, please try the following:


          - After you remove power to the system, press the power button a couple of times. This should cause the fans to spin for a moment, and will drain all remaining power to the motherboard. Let me know if the light is still partially lit.


          - If it is, please try the motherboard outside of the chassis, as you might be dealing with a grounding problem. Please place your motherboard on a table, on a non-conductive material, and try booting it with only basic hardware attached.

          • 2. Re: Intel DZ68DB and i7-2600K

            I tried the steps you provided.


            - All power was removed from the system.  I pressed the power button a few times.  The fans did not spin.  The standby LED was still partially lit.


            - I removed the motherboard from the chassis.  Everything was disconnected except the CPU and memory.  The LED was off until the HDMI or DVI cable was plugged in.  Instantly the LED was partially illuminated.  I removed the HDMI or DVI cable and the LED immediately went out.


            THE +5V from the HDMI or DVI cable is partially powering the LED.  This doesn't sound good.


            I then connected the power supply up and turned on the main power supply switch while the motherboard was outside of the chassis.  The LED illuminated fully.  I was able to start the system and go into the BIOS.  I changed the primary video port from <AUTO> to HDMI (the type of monitor which was connected).  I then rebooted.  The monitor was blank (absolutely no signal as the monitor turned off).  All that was connected to the motherboard at this point in time was the CPU, memory, power, CPU power, HDMI cable, and the power button.

            • 3. Re: Intel DZ68DB and i7-2600K

              Thank you once again for all the details. What happens if you run this system with a different monitor (different brand and model)? 

              • 4. Re: Intel DZ68DB and i7-2600K

                I've tried both a HDMI and DVI monitor with different results.  The HDMI monitor is made by Samsung.  The DVI monitor is made by HP.   It is also strange that <auto> works while manually setting the primary video port doesn't.  I would expect the reverse behavior if there was a cable or compatibility issue as I would expect the motherboard to 'try' harder to connect with the manually set monitor.


                I exchanged the motherboard yesterday with one that was shipped to me from Intel as a cross shippment.  The exchanged motherboard had the same exact results.  In fact, I plugged in both monitors (one at a time) before I installed the motherboard in a chassis, installed the CPU, or installed the memory.  The LED still illuminated partially.


                I then assembled the complete system and tested it with the video options.  Interesting enough I could see the BIOS splash screen when I first turned on the system.  I noted the primary video port was set to <AUTO>  I then attempted to load the BIOS defaults and noted the primary video port was changed to <DVI-I Analog>.  I changed this to <DVI-I Digital> and rebooted.  The BIOS splash screen never appeared and I could no longer go into BIOS.   I could get back into BIOS by moving the BIOS configuration jumper.  I changed the primary video port to <AUTO>, replaced the jumper, and rebooted.  The system came back up normally.  This is exactly what happend with my original motherboard -- all worked fine until I loaded the default BIOS settings.  Then I got no screen at all.  I took me hours in attempting to recover the BIOS and type on the keyboard blindly to attempt to fix the problem until I stumbled on the BIOS configuration jumper.


                Now why would a motherboard be shipped with different BIOS settings than the default unless it is known that the default settings will cause issues?


                The default CPU fan control settings is most likely not related to the monitor brand, cable, or compatibilty issues.  It seems like it would be in Intel's best interest to ensure the default CPU fan control settings will not cook CPU's.  The default CPU fan control settings where the fan is even attempted to be controlled is 80 degrees C.  Full fan on is set to 88 degrees C.  I have a i7 2600-K where the max temperature should not exceed 72.6 degrees C.

                • 5. Re: Intel DZ68DB and i7-2600K

                  I can confirm that this also occurs with a i5 2400 and isn't specific to the 2600k.


                  With the most recent v27 bios:


                  Selecting a primary video port such as HDMI, DisplayPort, DVI Digital and secondary port of "None" will present a blank screen when booting OS.


                  Intel Boot Graphic is viewable (if still enabled) and you can return to bios settings via F2.

                  With prior v14 BIOS I did have to use the jumper.


                  A slight workaround is to select a secondary video port (even if not used).

                  I say slight because depending on OS being loaded it still doesn't stick to using the primary monitor selected and can still go blank.


                  I'm reporting this as a bug to support (you should as well).


                  As far as the cpu temperature monitoring goes, those figures do seem absurd on this board.

                  Wether it is a switch from reading Tjunction, Tcase (or whatever the equilant is on Sandybridge), the values being read and the default fan settings are extreme.


                  BTW - The ACPI on this board is somewhat of a joke and doesn't look like it came from Intel.


                  Some of the more obvious clues:

                  1. DSDT created with 2005 iasl.

                  2. SSDT, MCFG created with Microsoft ASL

                  3. Legacy Floppy, LPT, PS/2, RS232 serial defined (this board is legacy free and the devices do not exist).


                  After using z68 boards from Gigabyte and MSI I had hoped this board would be a better reference board for z68.

                  In the end, the ACPI is almost identical to MSI's implementation (AMI based) and this board appears to be just a knock off OEM board.

                  • 6. Re: Intel DZ68DB and i7-2600K

                    Thank you for confirming this.


                    I have been in contact with Intel Support and they have been unable to reproduce the video issues with a system they put together to test it out.  They also swapped out the motherobard (at my expense for cross shipping),  The new motherboard did not resolve the issue.  They are claiming this is either an issue with the video cable or a compatability issue with the monitor even though I have tried this now with three different monitors (two DVI an done HDMI) and cables.


                    Intel Support has stated that the BIOS fan settings are not dynamic (i.e. the BIOS will not change the value depending on the type of installed CPU).  "It is up to the 'system integrator' to ensure these values are correct."  I would think that it would be better to default to conservative values at the risk of a noiser system then to overheat the system.


                    Intel's response on the standby LED being partially illuminated by the power from the DVI and HDMI port (power supply is unplugged) is that this is to let the user know there is still power running through the system to ensure the user disconnects power before servicing the motherboard.  Although this is nice, I swear yesterday the LAN port LED was also illuminated when the system was not connected to power.  The monitor was the only device connected.  This isn't right.

                    • 7. Re: Intel DZ68DB and i7-2600K

                      Unfortunately the answers you received sound like fairly generic responses.


                      If it were a monitor or cable issue it doesn't explain why auto "works".

                      Did they confirm what BIOS, video ports, and if they had tried "none" as a second monitor option?


                      I can understand the end user having to configure optimal fan settings, but what is glaring here is the default 80c fan settings and 60-77c nominal cpu temperature reporting. Again, I don't know what they are reading for cpu temperature (there are several methods) but on other boards I get the expected 34-45c temperature reporting with the same cpu and hsf.  High cpu temperatures would indicate a bad hsf install (and I have done a re-install of it and verified it is correctly seated) but the 80+c default fan settings would indicate they are expecting "high" cpu temps.  In the end this sounds like an accuracy issue in reporting proper temperatures but again, I don't know what they are reading.  I can confirm this same scenario exists on the z68 MSI board, but not on the other two z68 boards I have.


                      The more I look at the ACPI tables of this board it is obvious it wasn't created with Intel's influence on ACPI and Sandybridge specifically.

                      I wouldn't expect the tables to have been compiled with the Intel's latest and greatest iasl from acpica, but using a 2005 version (which is depreciated) and Microsoft ASL? The code itself has a few issues with IRQ routing among other items.


                      I did notice the dim power led lit with the PSU disconnected.  I didn't think to check the lan.

                      As there isn't useable power by a motherboard from a lan/video port connected to it this sounds bad and never heard of it as a "feature" before.

                      Those ports are supposed to be isolated from the rest of the power on the board and the fact that it is dim enough not to be noticeable in a well lit room, this isn't right.


                      I really wish Intel had a true Intel z68 reference board that they actually created.

                      This isn't it but let's see what we can get them to fix.

                      • 8. Re: Intel DZ68DB and i7-2600K

                        I agree that this isn't a cable or monitor issue.  I tried to convince the support person that it doesn't make sense that Auto and BIOS configure work fine.  This is clearly a BIOS or motherboard issue.


                        I don't know if the secondary port settings were tested with Intel's setup.  I personally did not change anything on the secondary port.


                        Please note that the CPU runs 'warm' when in the BIOS.  I understand that this is because certain CPU power optimizations are not enabled.  So, you may see a temperature reading of +55 C while in BIOS.  This is 'normal'.  This drops to 29 C when idle in Windows 7.

                        • 9. Re: Intel DZ68DB and i7-2600K

                          Mine did quite the same thing. Without the bios jumper I was able to access the bios again. Otherwise system works fine. i3-2100T works as a CPU & GPU and i've got two monitors attached. LG 42LK450N FullHD TV via HDMI, and 7" 800x480 touchscreen via DVI with VGA adapter.