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Thread: Asrock Z77 Extrem4 wont start with XMP-Profiles




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    Default Asrock Z77 Extrem4 wont start with XMP-Profiles

    Hi,
    got now my Z77 Extrem4 with Kingston HyperX DDR3-2400 Ram( http://www.kingston.com/datasheets/KHX24C11T2K2_8X.pdf ) an i5 3550@ 3.3GHz. The mainbord shows the 2 XPM-Profiles correctly. If i select one of them, the PC starts to boot, switch of and try to start another 2 times (Dr. Debug Code shows 23). Finaly boots with the DDR3-1333 CL9-9-9 timings. Bios Updated to 2.80 didn't help

    Any Ideas?

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    GIGHELP's Avatar
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    Default re: Asrock Z77 Extrem4 wont start with XMP-Profiles

    Have you tried to manually put the values to 2400?

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    Default re: Asrock Z77 Extrem4 wont start with XMP-Profiles

    Yes, didn't help :/

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    Default Re: Asrock Z77 Extrem4 wont start with XMP-Profiles

    POST code 23 is: OEM pre-memory initialization codes, so the problem is the memory trying to operate at 2400, or 2133, both of the XMP profiles.

    The two reboots and then setting the memory to a default speed (1333), is normal behavior for the BIOS when the PC cannot start at the higher memory speed.

    Did the XMP profiles set the memory voltage to 1.60V for 2133, and 1.65V for 2400?

    You may need to adjust the VTT voltage in the UEFI/BIOS, which is the voltage for the memory controller (IMC) in the CPU. Sometimes an XMP profile will set voltages like this, and sometimes not. Try selecting XMP1, and then check the VTT voltage, the help text should show the range for this voltage, and the default. If the VTT voltage is at the default value, try increasing it a little bit to see if it helps. If the boot still fails, raise VTT some more, but be careful, since you cannot check CPU temperatures if the PC won't start, obviously.

    You can also try relaxing the timings at 2133 and 2400, from 11 12 11 to 12 14 14 for 2133, for example.

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    Default Re: Asrock Z77 Extrem4 wont start with XMP-Profiles

    Thanx,
    I got it working with XMP-2133 Profile, but have to set the voltages by hand. Dram Voltage is now 1.6V and VTT raised to 1.104V.
    Tested also XMP-2400-Profile with Dram Voltage 1.65V and VTT Voltage to 1.15, but these settings dont work. Can i raise VTT more? Read some posts that VTT should not be raised over Dram Voltage - 0.5v(1.65v-0.5v=1.15v).

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    Default Re: Asrock Z77 Extrem4 wont start with XMP-Profiles

    Not sure about the VTT level, was that said about an Ivy Bridge CPU? The 1.65V for the RAM is the safe max for IB CPUs. You could try it one more step above 1.15V for VTT, and check CPU temps.

    At least 2133 worked, did you try 2400 with the timings set to Auto?

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    Default Re: Asrock Z77 Extrem4 wont start with XMP-Profiles

    Didn't get the ram working at 2400MHz. Bad, because its listed in the memory support list of asrock. The ram is working with the XMP-2133 Profile without changing anything.

    Asrock Z77 Extrem4 wont start with XMP-Profiles-ram-png


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    Default Re: Asrock Z77 Extrem4 wont start with XMP-Profiles

    Well, IMO it's not all or even mostly ASRock's fault, for two reasons. First, if we check the specs of your CPU, the maximum memory speed is 1600. That is the same for all Ivy Bridge CPUs. That is the speed Intel guarantees will work, anything beyond that is good luck with the memory controller on the CPU.

    Given the Intel memory speed spec, how can any memory manufacture guarantee that their product will work at speeds above the Intel spec? If a mother board also affects the memory speed, that is another variable that the memory manufacture is assuming will be fine.

    All the notes at the top of the ASR list are not meant for certain products, they are general statements for every product listed. Compatibility or support in this case means the memory will work with the board and CPU, and many memory modules will not work at all. Note4 states the OC mode is not guaranteed. I know it seems that the list implies the memory will work at the rated OC speed, but that is not always true.

    Have you contacted Kingston support for any help with this, or what they say about it?

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