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8700k overclock. 100.5Mhz bus speed when i set 100Mhz in Bios

So i have an 8700k paired with Msi godlike gaming MB.
setting x50 in bios with a base of 100Mhz.
XMP activated with G.skill 3200Mhz 32GB
Noctua Nh-d14 cooler

Stil when i boot into windows it's set to 100.5, this is causing more volt hungry CPU.
Got it stable with the current settings with 1.320 cpu volt. But it causes a decent ammount of heat.
BUT, when i managed to use the windows based OC program to set it to 100Mhz, it got stable atleast 1.290 volt. But i can't seem to lock it at 100Mhz, tried to uninstall every OC based programs. Updated BIOS on my motherboard.
Everything i've tried hasn't worked and everytime i enter windows it's set to 100.5
Also tried to disable XMP.
It just won't stay locked at 100mhz for some reason.
Reply to Leetago
5 answers Last reply Best Answer
More about 8700k overclock 100 5mhz bus speed set 100mhz bios
  1. Lower it to 99Mhz it should be 99.5Mhz.

    There are always some fluctuation btw.
    Reply to Robert Ban
  2. that just made stuff crash. and if i set 100.5 manually in bios that also causes a crash. but the few seconds i was in windows. it was running at x99.00 same when i booted with 99.5. it's when i set 100.00 it fucks up. but atleast it boots normal and is stable tho.
    Reply to Leetago
  3. Best answer
    Boards just do that. the 100 MHz is the frequency aimed for. My Z77 for example runs at 100.08 MHz BCLK (unless I move it to either 99.8 or 100.16 MHz) and I've heard of quite some MSI boards that do slightly less than plain 100 MHz.
    Your board differs by0.5% difference, which is surprisingly inside the range for "spread spectrum" which was implemented years ago (I've seen Pentium 4's having it) to soften EM emmisions coming from modern computers.
    Reply to lordmogul
  4. Yeah thats then motherboard fluctuation its normal as i see on reviews and etc.For example mine is 99.99.
    Reply to Robert Ban
  5. cool cool, i'll just have to have that extra bus clock then :) thnx for answers guys
    Reply to Leetago
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