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  1. #1
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    4770K stuck at 800Mhz ?!?!?

    Hi - I've got a really odd problem with my new setup and im hoping you guys can help me out.

    I thought I knew plenty about PC hardware but this is baffling me. I've just upgraded from my ageing core2duo to a 4770k running in a Gigabyte GA-z87x-oc. For some reason the chip seems to be stuck at 800Mhz?? Ive tried default Bios settings as well as upping various settings but nothing seems to make a difference. It's as though the turbo isn't kicking in or something even when running a game or Prime95 - could it be a faulty part?

    Here's what CPU-Z has to say



    Windows 8's task manger shows it at 20% when prime95 is running but Im guessing it just calculates it against the expected speed.

    Does anyone have any ideas? My new rig is slower than my old one!

  2. #2
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    If that is real then I would look to see if there is a new BIOS update. Download Aida64 to make sure it's real though just to get a 2nd opinion.
    New rig: INWIN D-Frame, i7 4770k @ 4.7 Ghz (no delid), Swiftech H220, MSI Z87-GD65 Gaming, Team Vulcan DDR3 1600, 9-9-9-24, Samsung 840 pro 256GB, EVGA GTX 780, Corsair 850W
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  3. #3
    Senior Member Knufire's Avatar
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    Try disabling C-states and Intel SpeedStep in the BIOS?
    i7-920 3.8 Ghz | Venomous-X w/ Panaflo HS | Sapphire Vapor-X 4890
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  4. #4
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    Quote Originally Posted by Rob94hawk View Post
    If that is real then I would look to see if there is a new BIOS update. Download Aida64 to make sure it's real though just to get a 2nd opinion.

    I believe it's real, games are running dog slow and are taking nd age to start, Aida64s report gave me this:

    Processor Properties:
    Manufacturer Intel
    Version Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz
    Asset Tag Fill By OEM
    Part Number Fill By OEM
    External Clock 100 MHz
    Maximum Clock 7000 MHz
    Current Clock 800 MHz
    Type Central Processor
    Voltage 1.1 V
    Status Enabled
    Socket Designation SOCKET 0
    HTT / CMP Units 0 / 4
    Capabilities 64-bit

    Try disabling C-states and Intel SpeedStep in the BIOS?
    I did think of that but there doesn't look to be anything in there called speedstep??? the Turbo features are there (and enabled) but nothing about lowering the clock.

    This being my first chip that uses Turbo, is it normal to see it idle at that sort of speed? Or is something very wrong?

  5. #5
    Senior Member Knufire's Avatar
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    If it's not going up during Prime95, something is wrong. Speedstep should definitely be in the BIOS somewhere, that's the feature that downclocks your CPU when it's idle.
    i7-920 3.8 Ghz | Venomous-X w/ Panaflo HS | Sapphire Vapor-X 4890
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  6. #6
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    They moved a few things around in the bios on the latest Gigabyte boards threw me for a loop the first time I saw one. You should be able to find the C-State settings under "Advanced CPU Core Features" under the performance > frequency tabs. When you disable all the C-States your CPU should be locked at its stock frequency of 3.5Ghz.

    Name:  GA-Z87X-OC.jpg
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  7. #7
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    Found another screen of options on the advanced CPU core features page.

    Name:  GA-Z87X-OC Advanced CPU Core Features.jpg
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    3770k @ 4.7ghz
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  8. #8
    Boulard83's Avatar
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    Windows power state locked at lower than 100% ?

    Screen saver / power management / something like "advance settings"
    Then you should be able to change de % of power windows ask to the CPU. Min/MAX.
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  9. #9
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    Thanks they all match my settings except ive disabled all of the cstate options but nothing is having an effect it still refuses to go above 800 - could it be os related? First install of win 8... grasping at straws I know but I'm really stumped

  10. #10
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    Quote Originally Posted by Boulard83 View Post
    Windows power state locked at lower than 100% ?

    Screen saver / power management / something like "advance settings"
    Then you should be able to change de % of power windows ask to the CPU. Min/MAX.
    Thanks but I checked that too min and max are both set to 100%

  11. #11
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    Great, just to make sure
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  12. #12
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    Just another wild guess - I'm only using the 4 pin power connector on the board, should I be using the 8? Would that even matter??

  13. #13
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    Quote Originally Posted by rooster790 View Post
    Just another wild guess - I'm only using the 4 pin power connector on the board, should I be using the 8? Would that even matter??
    Look the manual, it could be writen where to plug if you only use a 4 pin. I personnaly use a 8pin on my z87x-oc, i left the 4 pin unplugged.
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  14. #14
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    The 8 pin is the primary power source there I believe. Try that and see if it changes anything.

  15. #15
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    Quote Originally Posted by rooster790 View Post
    I did think of that but there doesn't look to be anything in there called speedstep??? the Turbo features are there (and enabled) but nothing about lowering the clock.
    The SpeedStep option is called CPU EIST Function.

  16. #16
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    Thanks for the suggestions guys but still no change, EIST disabled and using the 8 pin connector now. So weird. Do you think it's RMA time?

  17. #17
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    Rooster790 maybe this will help you with your Problem, i found this on the Net today!! It say's there is a switch in the Bios which is set by the Factory. This OC TRIGGER SWITCH or (TGR) is set at no 2 which Switches off all the Bios Commands and runs your CPU @ 800MHZ! To change this all you need to do is set it to NO 1 Position then the Bios will work as normal and you can Overclock your set up, Best Regards AJ.

    1, So after many hours or playing around and tweaking i finally decided to read the manual for my motherboard and found there is an OC Trigger Switch (TGR) this was set to 2 from factory when it needed to be set to 1.

    In position 2 the processor ignores all bios settings and runs using the lowest core multiplier possible which in the case of the Haswell 4770k is 8 which resulted in my core speed of 800mhz.

    In position 1 the processor functions according to the settings in the BIOS.

    TLR: Anyone who buys a Gigabyte GA-Z87X-OC Motherboard make sure you check the TGR switch is set to setting 1. Mine was set to setting 2 from factory.
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  18. Thanks!

    EarthDog (07-11-13), False Christian (02-12-14), Janus67 (09-03-13)

  19. #18
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    Quote Originally Posted by Ajay57 View Post
    Rooster790 maybe this will help you with your Problem, i found this on the Net today!! It say's there is a switch in the Bios which is set by the Factory. This OC TRIGGER SWITCH or (TGR) is set at no 2 which Switches off all the Bios Commands and runs your CPU @ 800MHZ! To change this all you need to do is set it to NO 1 Position then the Bios will work as normal and you can Overclock your set up, Best Regards AJ.

    1, So after many hours or playing around and tweaking i finally decided to read the manual for my motherboard and found there is an OC Trigger Switch (TGR) this was set to 2 from factory when it needed to be set to 1.

    In position 2 the processor ignores all bios settings and runs using the lowest core multiplier possible which in the case of the Haswell 4770k is 8 which resulted in my core speed of 800mhz.

    In position 1 the processor functions according to the settings in the BIOS.

    TLR: Anyone who buys a Gigabyte GA-Z87X-OC Motherboard make sure you check the TGR switch is set to setting 1. Mine was set to setting 2 from factory.
    Ajay, I think I'm actually in love with you...

    That's sorted it If I could buy you alcohol I would

    Guess this is a classic case of RTFM

    Thanks very much everyone for the help. Off to play with my new toy

  20. #19
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    Ajay, you bought a Z87 board and CPU? Nice!!!

    EDIT: Forget it, that was an unquoted quote.. gotcha!

    "We have more information and more ways of accessing it than ever, yet seem increasingly less inclined to do so."- Michael Wilbon

  21. Thanks!

    Ajay57 (07-13-13)

  22. #20

  23. Thanks!

    Ajay57 (07-13-13)

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