1 Reply Latest reply on Jun 8, 2015 12:18 PM by hansb_intel

    Why bus speed drops from 100 to 95mhz under Windows on my i5 4690k?


      Hi all,

      This problem occurs under Windows 8.1 (x64), while in bios everything looks fine. The bus speed should be ~100mhz but it keeps floating around 95mhz on idle, and 96mhz under 100% load and because of that cpu cant reach maximum speed. I tried to change power plan to high performance, and disabled all power saving options in bios (C3, C6/7, eist). With no effect. Can it be caused by some Intel drivers?


      What's interesting Intel XTU does not see the lower clock.