Cannot increase Active Core of 9900K to 4.9 or 5.0GHz in all cores

Discussion in 'Sager and Clevo' started by HoangThi, Nov 13, 2019.

  1. HoangThi

    HoangThi Notebook Enthusiast

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    Hi everyone.

    I have a problem. Hope someone can help me.
    I am using Clevo P751 with 9900k. 1 month ago, I can overclock my 9900K easily to 5.0GHz in all cores. But after upload my bios to 1.07.27, I cannot increase Active Core of 9900K to 4.9 or 5.0GHz in all cores.
    So do anyone knows why and help me solve this problem or give some information.

    Thank you very much.
     

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  2. jc_denton

    jc_denton V̖̟en̰g̻̼̰̩͙ea̲n̪c̭e̼ ͍̘̤͓̟̤Is̙͔ ̤Mi̻̭̣͎͍ͅn̰ḙ

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    You want to set 8 Active cores to x50 for 5Ghz across all cores. Or just set it in the bios.
     
  3. HoangThi

    HoangThi Notebook Enthusiast

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    I tried adjusting in the bios to 5.0 but it didn't work. The limitted active core is alway 48x
     
  4. jc_denton

    jc_denton V̖̟en̰g̻̼̰̩͙ea̲n̪c̭e̼ ͍̘̤͓̟̤Is̙͔ ̤Mi̻̭̣͎͍ͅn̰ḙ

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    So when you set all cores to x50 multiplier in the bios, it still reverts to x48 in Windows? Sounds like XTU or something else is overriding.
     
  5. Meaker@Sager

    Meaker@Sager Company Representative

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    Steps must always go up or stay the same. If 8 cores is 48x then 7 is 49x then 6 has be 49x or higher, it cant be 48x.
     
  6. HoangThi

    HoangThi Notebook Enthusiast

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    It automatically switches back to the 4.8GHz limit. As you can see in the image I attached, the limit for 8 cores is 4.8. I could not increase to 4.9 and 5.0
     
  7. Meaker@Sager

    Meaker@Sager Company Representative

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    Check the BIOS itself, there can be core limits in there that XTU cant exceed.
     
  8. HoangThi

    HoangThi Notebook Enthusiast

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    About 1 month ago, with older bios version (1.07.24), I can easily move to 5.0GHz in all cores. See attached picture.
    I don't know why. Maybe Intel release 9900KS and they locked frequency of 9900k by new bios update. I am not sure.
     

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  9. jc_denton

    jc_denton V̖̟en̰g̻̼̰̩͙ea̲n̪c̭e̼ ͍̘̤͓̟̤Is̙͔ ̤Mi̻̭̣͎͍ͅn̰ḙ

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    I doubt it. Try as Meaker suggested, and have all ratios set to x50 for all cores. If it still fails, XTU could be getting interfered by Clevo Control Center. You can try uninstalling them and forcing changes through the bios or use one of them.
     
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  10. HoangThi

    HoangThi Notebook Enthusiast

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    Good idea. I will try to uninstall control center and change core active in bios. Thank for your advice :)
     
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