Modification of MSI PC MATE Z170A for Skylake Xeon

If you want to modify the BIOS to support Intel Xeon processors for Skylake or newer, remember that you make any modifications at your own risk, get a BIOS programmer before the modification process. We need to change Reserved to Yes (alternatively you can use the ME Cleaner tool), we need to change to Intel FIT (Flash Image Tool) as shown on the screen below:

Changing the Reserved bit in Intel FIT (Flash Image Tool)

In my case, the modification works with the BIOS version below and equal to A.4. This version of BIOS was dated 2015/07/09 by AIDA64, and the manufacturer’s website shows date 18.09.2015. An attempt to upload version A.5 meant that my motherboard did not boot with the Pentium and Xeon processor, so the BIOS had to be reprogrammed with the CH341A programmer, with the SO8 clip shown in the photo below.

CH341A programmers
Pupular CH341A programmer with SOIC8 clip

A newer version than A.5 at each boot restores the BIOS settings to default when booting due to an unusual error, as shown in the photo below.

Unusual error
BIOS reset with unusual error

Before flashing, we need to check whether the Host Write Access and Local FWUpdate write options must be set to Enabled, when these options are disabled, we must unlock the BIOS using the CH341A programmer.

BIOS options required for flashing
BIOS options required for flashing

Official MSI support site:

https://www.msi.com/Motherboard/support/Z170A-PC-MATE

Popular Non K overclocking not working with this mod.

Running Xeon Skylake CPU on MSI Z170 Mainboard
Running Intel Xeon Skylake CPU on MSI Z170 Mainboard

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