11 Replies Latest reply on Aug 25, 2016 5:20 PM by Intel Corporation

    Low CPU speed, shows normal in safe mode

    Mciver24

      So recently I noticed in task manager my CPU speed is showing as 0.78 GHz, my processor is a 2.5 GHz. This shows as 2.49GHz in safe mode.  I'm curious what the issue could be as it does not change from 0.78 no matter what I do.

        • 1. Re: Low CPU speed, shows normal in safe mode
          N.Scott.Pearson

          This is the result of the power management capabilities enabled in your processor. The processor clock should move up to higher speeds as the processor is asked to do more work. When you say "no matter what I do", what did this entail? Try doing something like forcing Windows Update (or equivalent if running Linux) to run and you should see the clock speed increase...

           

          If you find that it never increases, it is possible that the power management configuration has locked it at this lower clock speed. This can be configured from within the Power Options applet in Control Panel. You can change to the High Performance power plan if you want to lock it at the highest clock speed. Alternatively, click on the Change Plan Settings link for your current power plan and then click on Change Advanced Power Settings to get into the editor for individual power parameters. In the Processor Power Management section, you can set the Maximum Processor State parameter to a higher percentage (like 100%, where it should default) to increase the maximum allowed clock speed.

           

          Hope this helps,

          ...S

          • 2. Re: Low CPU speed, shows normal in safe mode
            Mciver24

            So "no matter what I do" entails anything whether thats playing games etc, the speed does not change no matter what, I'm on high performance and I even set balanced and power saver to 100% mininum and maximum and it still hasn't changed.

            • 3. Re: Low CPU speed, shows normal in safe mode
              eekeenmouse

              I have the same issue with the system i just built,Its limited to 0.77GHz no matter how much load it apply,  its using an I5 6600K 3.5GHz with 16GB DRAM on a Asus Z170 Deluxe.

              I've changed every setting there is in the BIOS, and its still limited, even with no O/S installed so its not a windows setting causing it.

              • 4. Re: Low CPU speed, shows normal in safe mode
                N.Scott.Pearson

                Hhmmm... My suggestion is that you download and run the Intel Processor Diagnostic tool. You can get it here: Download Intel® Processor Diagnostic Tool.

                • 5. Re: Low CPU speed, shows normal in safe mode
                  eekeenmouse

                  I have already done that, it comes up all OK, every parameter was green, Thanks for the advice non the less,,,,

                  • 6. Re: Low CPU speed, shows normal in safe mode
                    N.Scott.Pearson

                    Ok, next thought is to check whether this is just an issue with the (Windows) display of the frequency (there are reports of this kind of issue on the web). Download and run the Intel Processor Frequency Id Utility. The download page is here: Drivers & Software. Both Windows and standalone (bootable) versions are available...

                     

                    Hope this helps,

                    ...S

                    • 7. Re: Low CPU speed, shows normal in safe mode
                      eekeenmouse

                      That program doesn't support the new systems, but the new version "Intel Processor Identification Utility" shows 0.80GHz.

                      The following is the ins and outs of the story so far:

                       

                      I followed all the info supplied by the various manufacturers but mainly ASUS MB instructions and videos, the system fired up and works as expected with no issues except one very big issue that i cannot fathom, the CPU is fixed at 0.77GHz speed, that’s 22% of the standard 3.5GHz expected from the "Intel I5 6600K", this is on the "ASUS Z170 Deluxe" MB with "G.Skill Ripjaws V Black 16GB (2x8GB) DDR4 PC4-25600 3200MHz Dual Channel Kit ".
                      I have checked the Windows 10 home OS is set on "performance" mode, the MB BIOS i updated to the newest S/W version "1801" before even building the rig following the official ASUS guide videos and hand book, i have tried running standard then with XMP enabled, then used the ASUS "Dual Intelligent Processors 5" program to automatically OC the system and it got to 4.7GHz (it said) and still actual speed is 0.77GHz (using CPUz and Task Manager to check). I have stressed the CPU using games, CPUz stress test and various other means but 0.77 is maxed out.
                      I have completely reset everything, clean M.2 drive, clean install of Windows 10, BIOS returned to stock values, cooling not an issue, even if i turn ALL the fans OFF just using the water pump the hottest i can get the CPU is 36*C, MB 38*C, PCH 45*C and VRM 38*C. Power is also no issue with the RM850 watt from Corsair.
                      I have checked the CPU with "Intel Processor Diag Tool 645.W.MP", everything was a Pass in green including the CPU.
                      I can also see in the UEFI (BIOS) screen that CPU speed is listed as 800MHz even with no O/S installed (no H/D connected). This would rule out O/S intervention.
                      I have contacted Asus support and they said with the testing that i have already done it would be doubtful to be S/W issue or a setting restricting the CPU speed. They adviced i run the system out of the case (of course on non-conductive surface) with only the basics connected and everything on its basic default setting, that made no difference. They also asked that i carefully check the CPU socket and CPU connections for damage/bent pins and contamination, these checked out fine, i even photographed the socket and CPU so could blow it up on a 24" screen, everything looks new.

                      I’m at a loss as to what is at fault, the speed limited to 22%, the BCLK at 100.2 x 8, the multiplier will not move of "X8" even though it has at best shown "x8 - 47" but still running at only “x8”, CPU core V at 0.813 (i have increased this to 1.225V but exactly the same 22% on CPU). I have also tweaked many other values a little but as there was no response from altering these i have put all back to standard rather than make matters worse. I have reset CMOS and locked the 3200MHz memory to 2133MHz (2x8GB).

                      I am not an expert but i have built and repaired many computers over the last 15 years so I’m not new to this work but this one has got me beat. I believe there is a H/W issue with either the CPU or the motherboard but i do not have access to (or the money to buy new) another 1151 type CPU or motherboard.

                      The "Intel Processor Diag tool" shows ALL OK, and the "Intel Processor Identification Utility" shows CPU speed Reported = 0.80GHz, Expected = 3.5GHz. Bus speed Reported and Expected = 100MHz.

                      I have not heard of any common issues with the hardware I’m using (see below for exact spec), any advise would be appreciated.

                      spec:

                      MS-W1064O      Windows 10 Home 64Bit English DVD - OEM
                      ASU-Z170D         ASUS Z170-DELUXE Intel Z170 (Socket 1151) ATX Motherboard
                      MKT-DOOM       ASUS DOOM PROMOITON
                      IL-I56600K           6th Generation Intel  Core? i5 6600K 3.5GHz Socket LGA1151 (Skylake) Processor - Retail
                      GSK-32016S        G.Skill Ripjaws V Black 16GB (2x8GB) DDR4 PC4-25600 3200MHz Dual Channel Kit
                      CSR-850I              Corsair RMi Series RM850i ATX Power Supply
                      SAM-951128       Samsung SM951 128GB M.2 PCI-e Gen3 8Gbps x 4 Solid State Drive
                      SAM-208GB        Samsung SE-208GB 8x Black Ultra Slim External DVD Re-Writer USB (Retail)
                      LOG-C920            Logitech HD Pro C920
                      CAB-DPHDMI     HDMI to Display Port Cable 2 Metre
                      AOC-G2460V      AOC G2460VQ6 24" LED monitor
                      POW-RX480        PowerColor Radeon RX 480 8GB GDDR5
                      XSPC                    Water cooling, 360mm rad, 460 lph cooling only CPU

                       

                      Any ideas Gents???

                       

                      P.S. Thanks   

                      • 8. Re: Low CPU speed, shows normal in safe mode
                        eekeenmouse

                        I have been trying to contact Intel's Contact support since Saturday but no luck, any ideas how we are supposed to Email them? Email address or a link to Intel page that works?

                         

                        Thanks in advance chaps.

                        • 9. Re: Low CPU speed, shows normal in safe mode
                          N.Scott.Pearson

                          Ok, old f@rt asking: whatever happened to just picking up the phone and calling them?

                          • 10. Re: Low CPU speed, shows normal in safe mode
                            Intel Corporation
                            This message was posted on behalf of Intel Corporation

                            eekeenmouse please try our phone support, see here for the contact information Contact Support

                             

                            Regards,

                            Amy.

                            • 11. Re: Low CPU speed, shows normal in safe mode
                              Intel Corporation
                              This message was posted on behalf of Intel Corporation

                              eekeenmouse were you able to contact our phone support?

                               

                              Regards,

                              Amy.