https://community.intel.com/t5/Mobile-and-Desktop-Processors/I7-6700K/m-p/1752977#M88999 <P>It is a used processor, so do not expect much.</P><P>Has your motherboard bios been updated?</P><P>Do you know for certain that your motherboard supports this processor?</P><P>&nbsp;</P><P>And, while I do not see your processor in the list, you can try running the IPDT:</P><P><A href="https://www.intel.com/content/www/us/en/support/articles/000005567/processors.html" target="_blank">https://www.intel.com/content/www/us/en/support/articles/000005567/processors.html</A></P><P>&nbsp;</P><P>&nbsp;</P><P>Doc (not an Intel employee or contractor)<BR />[Success breeds complacency. Complacency breeds failure. (Andy Grove)]</P> Thu, 02 Jul 2026 20:22:43 GMT AlHill 2026-07-02T20:22:43Z https://community.intel.com/t5/Mobile-and-Desktop-Processors/I7-6700K/m-p/1752976#M88998 <P>So I bought a I7 6700K second hand and my processor only has 2/4 cores working. and I have went through and changed my core count to 4 and done every YouTube tutorial to fix this and nothing has changed. can anyone please help me fix this problem.</P> Thu, 02 Jul 2026 20:06:38 GMT https://community.intel.com/t5/Mobile-and-Desktop-Processors/I7-6700K/m-p/1752976#M88998 OOSTER 2026-07-02T20:06:38Z https://community.intel.com/t5/Mobile-and-Desktop-Processors/I7-6700K/m-p/1752977#M88999 <P>It is a used processor, so do not expect much.</P><P>Has your motherboard bios been updated?</P><P>Do you know for certain that your motherboard supports this processor?</P><P>&nbsp;</P><P>And, while I do not see your processor in the list, you can try running the IPDT:</P><P><A href="https://www.intel.com/content/www/us/en/support/articles/000005567/processors.html" target="_blank">https://www.intel.com/content/www/us/en/support/articles/000005567/processors.html</A></P><P>&nbsp;</P><P>&nbsp;</P><P>Doc (not an Intel employee or contractor)<BR />[Success breeds complacency. Complacency breeds failure. (Andy Grove)]</P> Thu, 02 Jul 2026 20:22:43 GMT https://community.intel.com/t5/Mobile-and-Desktop-Processors/I7-6700K/m-p/1752977#M88999 AlHill 2026-07-02T20:22:43Z