i7 7700k / ASRock Z270 KILLER SLI/AC - Help!!!

Hi all,

This is my first time posting. I haven't gone through an overclock in several years, so I apologize if I'm missing something simple here.

I just upgraded to a 7700k on a ASRock Z270 KILLER SLI/AC board. I was super excited to get this thing going with hopes of a soft overclock. However, I'm afraid I've either gotten a bad board, or unlucky with my chip. At stock speeds, after 30 minutes or so of Prime95 Blend, my temps are reaching 81-85c. I am cooling with an EVGA 280mm CLC. My i5 3570k ran much cooler. I know that Kaby runs hot, but this seems ridiculous.

I've attempted to lower my vcore in the BIOS. When on auto, at 100% load, CPUZ is telling me that my voltage is right around 1.216 and bounces up to 1.232. When I go into my BIOS and set my voltage to fixed, and drop the voltage to even 1.225, Prime95 locks up, forcing a restart. It seems I am unable to lower my voltage at all. Does my voltage seem high for stock speeds? I know I won't be able to do much overclocking if I can't change the vcore.

Any help is greatly appreciated. I'm driving myself crazy.
Reply to j_dub_2004
5 answers Last reply
More about 7700k asrock z270 killer sli
  1. The thermal snot on Kaby lake is exceptionally bad.
    If your fan/pump profiles are fine and you got good paste coverage on the CPU, then this is really the only way to fix that:
    https://www.youtube.com/watch?v=Bhe85LLQEfw
    Reply to KahouAoki
  2. But why would my voltages be so touchy? Is it normal to not be able to change them at all?
    Reply to j_dub_2004
  3. You can change them in bios, yes, but what you're running at right now can be considered the minimum that cpu will work at. Lowering the voltage just makes the CPU unstable.
    Reply to KahouAoki
  4. Yeah, I changed them in the BIOS. I'll just assume that "Auto" sets it to the minimum that it can run.

    I ran a Prime95 Blend test overnight last night, 8 hours. The max temp was 83c. Does that seem normal, or still too hot?
    Reply to j_dub_2004
  5. That is quite normal for a 7700K non delidded.
    Reply to Kasper Jorgensen
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