5 Replies Latest reply on Nov 30, 2017 12:58 PM by Intel Corporation

    i5-8400 Turbo Boost not working

    Phantom160

      I installed both Intel Turbo Boost Technology Monitor and CPU-Z and ran prime95 single core benchmark + gaming. In neither of the cases I was able to register Turbo Boost working (at all times the clock speed was capped at 2.8 GHz).

       

      I made sure Turbo Boost is enabled in BIOS (I have ASRock Z370M-ITX/ac with latest BIOS version). My question is: is there any definitive way to confirm that Turbo Boost is working? How do I troubleshoot this issue?

       

      Thank you!

        • 1. Re: i5-8400 Turbo Boost not working
          Intel Corporation
          This message was posted on behalf of Intel Corporation

          Thank you very much for contacting the Intel® Processor communities. We will do our best to assist you with this scenario.

           

          In this case, we always recommend to install the latest BIOS version on the board and also the latest version of the chipset and management engine drivers:
          https://www.asrock.com/mb/Intel/Z370M-ITXac/#Download

           

          In order to confirm that the Intel® Turbo Boost Technology is working, we can always run the Intel® processor diagnostics tool as well:
          https://downloadcenter.intel.com/download/19792/Intel-Processor-Diagnostic-Tool

           

          Additionally, on the link below you will find more details about the feature:
          https://www.intel.com/content/www/us/en/support/articles/000005641/processors.html

           

          Any further questions, please let me know.

           

          Regards,
          Alberto R

          • 2. Re: i5-8400 Turbo Boost not working
            Phantom160

            Hi Alberto,

             

            Thank you for your reply. I confirmed that I have the latest BIOS (v.1.2) and Turbo Boost is enabled in BIOS. Further, I ran Intel processor diagnostics tool and I don't see any conclusive indicators that Turbo Boost is working. All clock speed monitors that I've used show 2.8 Ghz top speed. Please see below diagnostics report:

             

            --- IPDT64 - Revision: 4.0.0.29

            --- IPDT64 - Start Time: 11/15/2017 11:50:29 PM

             

             

            --------------------------------------------------------------------

            -- Testing

            --------------------------------------------------------------------

            CPU 1 - SPBC - Pass.

            CPU 1 - Genuine Intel - Pass.

            CPU 1 - BrandString - Pass.

            CPU 1 - Floating Point - Pass.

            CPU 1 - Prime Number - Pass.

            CPU 1 - Cache - Pass.

            CPU 1 - MMXSSE - Pass.

            CPU 1 - FMA - Pass.

            CPU 1 - AVX - Pass.

            CPU 1 - IMC - Pass.

            CPU 1 - PCH - Pass.

            CPU 1 - IGD - Pass.

            CPU 1 - GFX - Pass.

            CPU 1 - CPULoad - Pass.

            CPU 1 - CPU Frequency - Pass.

             

             

            IPDT64 Passed

            --- IPDT64 - Revision: 4.0.0.29

            --- IPDT64 - End Time: 11/15/2017 11:55:30 PM

             

             

            --------------------------------------------------------------------

             

             

             

             

            --- IntelR spbc Module Test --

            ...

            Version 1.0.8.64b.W

            ...

             

             

            ..Retrieved Processor Manufacturer

            GenuineIntel

             

             

            ..Retrieved Processor Brand String

            IntelR CoreTM i5-8400 CPU  2.80GHz

             

             

            IntelR spbc Module Test -- Pass --

             

             

            --- Genuine Intel Test ---

            ...

            Version 1.0.12.64b.W

            ...

             

             

            Expected -- GenuineIntel

            Detected -- GenuineIntel

             

             

            Genuine Intel CPU Module Success

             

             

            --- Brand String Test ---

            ...

            Version 1.0.14.64b.W

            ...

             

             

             

             

            Brand String Module Success....

             

             

            --- Floating Point Test ---

            ...

            Version 1.0.11.64b.W

            ...

             

             

            AVX is supported in your OS

            Max AVX supported  AVX2

            FMA3 supported

            MFLOPS            CycleRun       Error       Timesec

             

             

            130.26              2004          0            1       

            205.205              5161          0            2       

             

             

            Million Floating Points per Second MFLOPS -- 205.205

            Error -- 0

             

             

            Floating Point Test Passed

             

             

            --- Prime Number Generation Test ---

            ...

            Version 1.0.13.64b.W

            ...

             

             

            AVX is supported in your OS

            Max AVX supported  AVX2

             

             

            Ops Per Sec       CycleRun       Error       Timesec

             

             

            127783             7             0            1       

            127401             14             0            2       

             

             

            Operation Per Second -- 127401

            Error -- 0

             

             

            Prime Number Generation Test Passed

             

             

            --- Cache Test ---

            ...

            Version 1.0.11.64b.W

            ...

             

             

            --- Reading Cache Size ---

             

             

            - Detected L1 Data Cache Size -- 32

            - Detected L1 Inst Cache Size -- 32

            - Detected L2 Cache Size -- 256

            - Detected L3 Cache Size -- 9216

             

             

            Cache Module Success

             

             

            --- MMXSSE Test ---

            ...

            Version 1.0.11.64b.W

            ...

             

             

            --- Determining MMX - SSE capabilities ---

             

             

             

             

            --- CPU FEATURES DETECTION FOR ---

                        ---        MMX SSE       ---

            MMX - Intel MMX Technology Supported -- Yes

            SSE - Streaming SIMD Extensions Supported -- Yes

            SSE2 - Streaming SIMD Extensions 2 Supported --Yes

            SSE3 - Streaming SIMD Extensions 3 Supported --Yes

            SSSE3 - Supplemented SSE 3 Supported --Yes

            SSE4.1 - Streaming SIMD Extensions 4.1 Supported --Yes

            SSE4.2 - Streaming SIMD Extensions 4.2 Supported --Yes

            --- MMX SSE capabilities check complete ---

             

             

            Testing MMX

            Dot Product computed using C code  506

            Dot Product computed using MMX intrinsics  506

            MMX Dot Product Computation Test Passed

            Passed MMX Test

             

             

            Testing SSE

            Dot Product computed using C code  506

            Dot Product computed using SSE intrinsics  506

            SSE Dot Product Computation Test Passed

            Passed SSE Test

             

             

            Testing SSE2

            Complex Product computed using C code 23.00 -2.00i

            Complex Product computed using SSE2 code 23.00 -2.00i

            SSE2 Complex Product Computation Test Passed

            Passed SSE2 Test

             

             

            Testing SSE3

            Complex Product using C code 23.00 -2.00i

            Complex Product using SSE3 code 23.00 -2.00i

            SSE3 Complex Product Computation Test Passed

            Passed SSE3 Test

             

             

            Testing SSSE3

            SSSE3 Absolute Value Tests Passed

            SSSE3 Arithmetic Tests Passed

            SSSE3 Dot Product Test Passed

            Passed SSSE3 Test

             

             

            Testing SSE4.1

            SSE4.1 Blend Tests Passed

            SSE4.1 Min Max Tests Passed

            SSE4.1 Insert Bit Tests Passed

            SSE4.1 Extract Bit Tests Passed

            SSE4.1 Bitwise Comparison Tests Passed

            SSE4.1 Dot Product Test Passed

            SSE4.1 Arithmetic Tests Passed

            SSE4.1 Bit Conversion Tests Passed

            SSE4.1 Bit Compare Test Passed

            Passed SSE4.1 Test

             

             

            Testing SSE4.2

            SSE4.2 Bit Compare Test Passed

            SSE4.2 Calculate Bit Set to 1 Test Passed

            SSE4.2 CRC Test Passed

            Passed SSE4.2 Test

             

             

             

             

            MMXSSE Module Success

             

             

            --- FMA3 Test ---

            ...

            Version 1.0.10.64b.W

            ...

             

             

            --- CPU Features Detection ---

            FMA3 - Supported -- Yes

             

             

            Testing FMA3....

            FMA3 Test Result --- PASS

             

             

            FMA3 Module Success

             

             

            --- AVX Test ---

            ...

            Version 2.0.8.64b.W

            ...

             

             

            --- CPU Features Detection ---

            AVX - Supported -- Yes

            AVX2 - Supported -- Yes

            AVX512 - Supported -- No

            AVX OS Support - Supported -- Yes

            AES - Supported -- Yes

            PCLMULQDQ - Supported -- Yes

             

             

             

             

            Testing Most Advanced AVX Feature - AVX2....

            AVX2 Test Result --- PASS

             

             

            Testing AES

            AES Test Result --- PASS

             

             

            Testing PCLMULQDQ

            PCLMULQDQ Test Result --- PASS

             

             

             

             

            AVX Module Success

             

             

            --- Integrated Memory Controller Test ---

            ...

            Version 1.0.8.64b.W

            ...

             

             

            StatusFMmatched 0

            --- Reading Memory Size ---

             

             

            Detected Memory Size is -- 16.00GB

             

             

             

             

            --- Subtest - Memory Size Test Passed  ---

             

             

             

             

            --- Integrated Memory Controller Stress Test ---

             

             

            Memory to be allocated  1048576 byte

             

             

            Memory Allocated.

             

             

            Test 1 Ones and Zeros Moving Inversions write operations - Passed

             

             

            Test 1 Ones and Zeros Moving Inversions verification operations - Passed

             

             

            Test 2 32Bits Sliding Ones write operations - Passed

             

             

            Test 2 32Bits Sliding Ones verification operations - Passed

             

             

            Test 3 32Bits Sliding Zero write operations - Passed

             

             

            Test 3 32Bits Sliding Zero verification operations - Passed

             

             

            Memory Deallocated.

             

             

            --- Subtest - Memory Stress Test Passed ---

             

             

             

             

            --- Integrated Memory Controller Stress Test Passed ---

             

             

            --- Platform Controller Hub Test ---

            ...

            Version 1.0.10.64b.W

            ...

             

             

            LPC deviceID  0xa2c9

             

             

            ---  Platform Controller Hub Test not supported current chipset  ---

            ..Skipping Platform Controller Hub Test..

             

             

            PCH has a configuration mismatch

            Return Status  5

             

             

            --- Intel Graphics Device ---

            ...

            Version 1.0.12.64b.W

            ...

             

             

             

             

            Model in hex 0x9e

            ..

            ..Query 4..

            ..

            --- Querying for IntelR Integrated Graphics Device IGD ---

            ..IntelR Integrated Graphics Device not supported on this processor..

            ..Skipping IntelR Integrated Graphics Device Presence Test..

            ..

             

             

            ..Query 4..

             

             

            --- Querying for IntelR Integrated Graphics Device IGD

            ..IntelR Integrated Graphics Device not supported on this processor..

             

             

            .. Skipping IntelR Integrated Graphics Device Presence Test..

             

             

            .. Check if hex value for Model displayed above ..

            .. is in the IGD_LocalConfig.xml file ..

             

             

            Intel Graphics Device Module has a configuration mismatch

            Return Status  5

             

             

            --- Graphics Test ---

            ...

            Version 1.0.12.64b.W

            ...

             

             

            3D run time is 20 seconds

            3D spin rate is 5

             

             

            vis2Dgfx.exe ..2D Graphics Binary found..

            ..Executing.. vis2Dgfx.exe

             

             

            --------------------------------

            ..Starting Color Spectrum Test..

            --------------------------------

            Entering GFXMain.  sGFXexe  visGFX1.exe

            iGTime  20

             

             

            visGFX1.exe ..3D Graphics Binary found..

            ..Executing.. visGFX1.exe -t 20 -s 5

             

             

            -----------------------------

            ..Starting 3D Graphics Test..

            -----------------------------

             

             

            -----------------------------------------------------------------------

            ..Closing the 3D graphics window will cause GFX to close unexpectedly..

            -----------------------------------------------------------------------

             

             

            ..2D Graphics Visual Display Passed..

             

             

            ..3D Graphics Visual Display Passed..

             

             

            Graphics Module Success

             

             

            ...

            Version 1.0.12.64b.W

            ...

            ... Loading CPU ...

             

             

            CPULoad Success

             

             

            --- CPU Frequency Test ---

            ...

            Version 1.0.16.64b.W

            ...

             

             

            Expected CPU Frequency is -- 2.80

            Detected CPU Frequency is -- 2.69807

             

             

            Expected Base Clock -- 100 MHz

            Detected Base Clock -- 99.9286 MHz

             

             

            CPU Frequency Test Passed

             

             

            QPI link rate Test - Not supported.

            Skipping QPI link rate Test.

            • 3. Re: i5-8400 Turbo Boost not working
              Intel Corporation
              This message was posted on behalf of Intel Corporation

              Hi : Thank you very much for providing that report. There is a setting on the BIOS on the Intel boards that is called Intel® SpeedStep that allows the clock speed of the processor to be dynamically changed by software. Please get in the BIOS and look for that option, if it is enabled, disable it or the other way round.

              If after trying that step the problem persists or if the option it no showing on your BIOS, then the next thing to do, if you have the option of course, will be to test your board with a different processor  or test your processor on a different board. Otherwise please get in contact directly with Intel to claim the warranty on the unit:
              Chat support:
              http://intelsupportchat.force.com/icslivechat/ics_tech_processor_ww_english_Chat,

              For phone support, depending on your location, you will see the contact information on the links below:
              EMEA contact information: https://www.intel.com/content/www/us/en/support/contact-support/emea-contact.html
              APAC contact information: https://www.intel.com/content/www/us/en/support/contact-support/apac-contact.html
              LAR contact information: https://www.intel.la/content/www/xl/es/support/contact-support/lar-contact.html
              North America: Phone Number  1-916-377-7000, Monday – Friday 7:00 AM to 5:00 PM (Pacific Time).

              Any questions, please let me know.

              Regards,
              Alberto R

              • 4. Re: i5-8400 Turbo Boost not working
                Phantom160

                The new version of BIOS was posted on ASRock website yesterday (v1.5, posted on 11/28/2017). I updated the BIOS and the problem was solved. I confirmed that the CPU operates at clock speeds above 2.8GHz using CPU-Z right after restart, without running any benchmarks. As a matter of fact, the clock speed showed 4000MHz (which is an amazing improvement)

                1 of 1 people found this helpful
                • 5. Re: i5-8400 Turbo Boost not working
                  Intel Corporation
                  This message was posted on behalf of Intel Corporation

                  Perfect, excellent, thank you very much for letting us know that information, we are glad to hear the problem got fixed with the new BIOS from ASrock and now the PC is working properly.
                   
                  Any other inquiry, do not hesitate in contact us again.
                   
                  Regards,
                  Alberto R