9 Replies Latest reply on Apr 29, 2016 2:11 PM by Intel Corporation

    CPU speed problem

    Qukerz

      Hello!

       

      I have a strange problem with my CPU speed. My laptop always start up with 3.5GHz speed running, when i'm doing a restart or turning on my laptop.

      My CPU is: i7-4710HQ Quad Core (2.5 GHz, Intel Haswell Architecture, Features Intel Turbo Boost up to 3.5GHz).

       

      I know that my CPU have a "Intel speed step technology" but i want to figure out on which speed my CPU should run when i power up or restart my laptop (1.8, 2.5 or 3.5GHz) ?

       

      I'm also tried to boot in safe mode and my CPU speed was 2.5GHz on start up.

       

      P.S.

       

      1) I'm already updated my BIOS

      2) did sfc scan, result: "Windows Resource Protection did not find any integrity violations".

      3) Used optimizer to delete junk files.

      4) disabled startup items.

        • 1. Re: CPU speed problem

          Make sure your heatsink isn't clogged up any. Good idea to clean it out with a can of compressed air every once in awhile.It can indeed be tough to tell with a laptop in regard to fans, as you are never exactly sure of what they are doing, unless of course you monitor them constantly (not happening). Just another example of how having locked down BIOS can slow some down (literally and figuratively).

           

          1. Open task manager

          2. Select the "performance" tab

          3. Close all applications and wait for CPU usage go down to 1-3%

          4. Watch the value displayed underneath "Speed" for about a minute

          5. Unplug / Plug in the power supply and watch the CPU frequency again

           

           

           

          • 2. Re: CPU speed problem
            Qukerz

            Hello, richardsonkane75

             

            I'm already cleaned and added new thermal to my CPU & GPU like 2 weeks ago. It helped me a lot!

             

            When i'm starting up my windows i don't have any applications running.

             

            Maybe i found a solution... i was playing with processor power management -> Maximum & Minimum processor state.

            and found interesting results:

             

            Minimum & Maximum on 72% CPU work stable on 1.78GHz:

            72 cpu.jpg

            Minimum & Maximum on 99% CPU work stable on 2.48GHz:

            99 cpu.jpg

            Minimum & Maximum on 100% CPU work stable on 3.25GHz:

            100 cpu.jpg

            P.S.


            And yes, my laptop CPU speed goes from 3.5GHz or from 2.48GHZ to 1.8GHz when i unplug and plug in the AC Power adapter! and it stays on 1.8Ghz all the time till i restart my laptop.

             

            And one more strange thing... when i set my processor state to 99% on power option and turning off my laptop. Then starting it up and i have 1.8Ghz on start up. But, after restart i have 2.48GHz .

             

            I'm using "Conservation mode" on my laptop. That means my battery always on 60% with plugged in AC power adapter.

             

            • 3. Re: CPU speed problem
              Intel Corporation
              This message was posted on behalf of Intel Corporation

              Qukerz, could you please let me know your computer model?

               

              Regards, 

              Amy. 

              • 4. Re: CPU speed problem
                Qukerz

                Hello, Amy

                 

                Model: Lenovo Y50-70

                 

                P.S.

                 

                My CPU speed also goes down to 1.8GHz after i wake up from sleep mode. I tried everything to get it back to 2.48GHZ but nothing... only restart fixes this problem.

                • 5. Re: CPU speed problem
                  Intel Corporation
                  This message was posted on behalf of Intel Corporation

                  Try disabling the Enhanced Intel SpeedStep® Technology, another thing I would recommend is updating your BIOS version, see here for the download Laptops :: Lenovo Y Series laptops :: Y50-70 Laptop (Lenovo) - Lenovo Support (US).

                   

                  Regards, 

                  Amy. 

                  • 6. Re: CPU speed problem
                    Qukerz

                    Hello,

                     

                    I'm already updated BIOS. Unfortunately i don't have an option to disable: "Enhanced Intel SpeedStep® Technology" in my BIOS.

                    • 7. Re: CPU speed problem
                      Intel Corporation
                      This message was posted on behalf of Intel Corporation

                      Try disabling it with these steps How do I turn off Enhanced Intel SpeedStep® Technology (EIST)? | Yahoo Answers.

                       

                      Qukerz, have you tried contacting Lenovo in regard to this matter? If you have not done that, try to since it is possible that  they may already be aware of the situation and could give you specific troubleshooting assistance.

                       

                      Regards, 

                      Amy. 

                      • 8. Re: CPU speed problem
                        Qukerz

                        Hello, Amy

                         

                        Thank you for helping me

                         

                        I figured out there is a problem in my model of laptop. I'm already asked them to add new BIOS update. To fix that my CPU won't slow down to 1.8GHz after i return from sleep mode.

                         

                        P.S.

                         

                        My Enhanced Intel SpeedStep® Technology works great! But i disabled the turbo boost by reducing "Maximum & Minimum processor state" to: 99% because my laptop overheat with turbo boost with 3.5GHZ. Now it work great with max speed 2.5GHz


                        Till Lenovo will release a BIOS fix.. now i'm using "Power Saver Mode" instead of "Sleep Mode" i think its best alternative.

                        • 9. Re: CPU speed problem
                          Intel Corporation
                          This message was posted on behalf of Intel Corporation

                          Sure, you're welcome. I am glad to hear to heat that you were able to track this down.

                           

                          Let me know if the new upcoming BIOS fixes your issue.

                           

                          Regards,

                          Amy.