stasio

Basics Unlike K-CPUs which can be overclocked using the multiplier, non-K CPUs have to be overclocked using the BCLK. Pre-Skylake CPUs such as Haswell or Devils Canyon could only be overclocked by about 3-5% using the BCLK because the BCLK was still tied to the DMI and the PCIe. http://overclocking.guide/gigabyte-z170-non-k-overclocking-guide/

F5g (or any earlier) should work for retail CPU version......not sure about your 6400t ES CPU.... GIGABYTE GA-Z170X-Gaming 3 Non-K OC BIOS - Overclocking.Guide Edit: Just checked ...even F5m should work. Can you check CPU ID for your processor.This BIOS's is for 06E3 CPU ID. Sample:

http://download.gigabyte.asia/FileList/BIOS/mb_bios_ga-z170x-gaming5_f5h.zip

Rev, 1.0 and 1.1 BIOS is same... Btw, latest BIOS: GA-Z170X-Gaming 3 - F8e

I have only F3y.... LN2 for Champion: F3y or latest F22n: https://www.mediafire.com/?dgz89g173yxzook

Evga X99 Classified 2.02 http://cdn.evga.com/BIOS/x99/E999_flashtool_202.zip Evga X99 FTW-K 2.01 http://cdn.evga.com/BIOS/x99/E097_flashtool_201.zip Evga X99 FTW 2.01 http://cdn.evga.com/BIOS/x99/E997_flashtool_201.zip Evga X99 Micro 2.01 http://cdn.evga.com/BIOS/x99/E995_flashtool_201.zip Evga X99 Micro2 2.01 http://cdn.evga.com/BIOS/x99/E095_flashtool_201.zip http://www.evga.com/support/download/showdlinfo.aspx?id=10443&type=N&acctype=BIOS&accversion=2.01&part_number=151-BE-E097

GA-X99-SOC Champion - F22m GA-X99-SOC Force - F22h GA-X99-Gaming G1 WIFI - F22j GA-X99-Gaming 7 WIFI - F22g GA-X99-Gaming 5 - F22h GA-X99-Gaming 5P - F22l GA-X99M-Gaming 5 - F22i GA-X99-UD7 WIFI - F22g GA-X99-UD5 WIFI - F22i GA-X99-UD4 - F22h GA-X99-UD4P - F22k GA-X99-UD3 - F22g GA-X99-UD3P - F22k GA-X99-SLI - F22k

Same as F22m (except new UEFI setup screen): http://www.gigabyte.com/products/product-page.aspx?pid=5280#bios

GA-Z170X-SOC Force - F7i GA-Z170X-UD5 - F6d GA-Z170MX-Gaming 5 - F5b

GA-Z170X-SOC Force - F7h GA-Z170X-Gaming G1 - F8i GA-Z170X-Gaming 7 - F8l

GA-Z170X-SOC Force - F7f GA-Z170X-Gaming G1 - F8f GA-Z170X-Gaming 7 - F8i

GA-X99-SOC Champion - F22h GA-X99-Gaming 5P - F22g GA-X99-UD4P - F22g GA-X99-UD3P - F22g GA-X99P-SLI - F22l

GA-Z170X-SOC Force - F7e GA-Z170X-Gaming G1 - F8e GA-Z170X-Gaming GT - F7b GA-Z170X-Gaming 7 - F8g

GA-X99-SOC Champion - F22f GA-X99-SOC Force - F22d GA-X99-Gaming G1 WIFI - F22e GA-X99-Gaming 7 WIFI - F22c GA-X99-Gaming 5 - F22d GA-X99-Gaming 5P - F22e GA-X99M-Gaming 5 - F22e GA-X99-UD7 WIFI - F22c GA-X99-UD5 WIFI - F22e GA-X99-UD4 - F22c GA-X99-UD4P - F22e GA-X99-UD3 - F22c GA-X99-UD3P - F22e GA-X99-SLI - F22e

GA-X99-SOC Champion - F21e GA-X99-Gaming G1 WIFI - F21d GA-X99-Gaming 7 WIFI - F21c GA-X99-Gaming 5P - F21g GA-X99M-Gaming 5 - F21f GA-X99-UD7 WIFI - F21c GA-X99-UD5 WIFI - F21c GA-X99-UD4 - F21g GA-X99-UD3 - F21f GA-X99-UD3P - F21c GA-X99-SLI - F21e