BCLK cannot be set on the Asrock Z370Pro4

[Whr]

CPU: E3 1270 V6
Motherboard: Asrock Z370Pro4
When I try to set a higher BCLK in BIOS to get a higher frequency, as shown in the picture, I set BCLK to 101, but after a reboot, it still shows BCLK to 100 or less in CPUZ
I was even more surprised to see the memory frequency displayed in task Manager as 3232. After I set BCLK to 102.7, I will get a blue screen, once I enter the system, CPUZ will show that BCLK is only 100 or less anyway.

Before setting BCLK

After setting up BCLK

HKEY_LOCAL_MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0