7D31v18 - Features [Z690]

Ezmafl

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Joined
Dec 4, 2021
Messages
54
I flashed to 7D31v18 this morning. I noticed the following new options now available in the BIOS. My board is an Edge Z690 WiFi DDR4 with an i9-12900K. Not sure if it's applicable to all Z690 boards, but would assume so if there was a new BIOS rolled out for your respective Z690 board recently:

Microcode: 0x25
OC Menu -> Memory Fast Boot When OC Fail [Enabled/Disabled]
OC Menu -> Memory OC Retry Count [specify #]
Advanced CPU Configuration -> BCLK 100mhz Lock On [Enabled/Disabled]

Previously if most of us wanted an even 100.0mhz bus clock, we changed the the BUSCLK to 100.25 to compensate. I did confirm that 100.0 with the latter option set to ENABLED results in an even 100.0 mhz reading in CPU-Z and HWInfo.

As normal, the board did boot/reboot a couple of times before having the screen output. After I mass applied my settings, it took a couple of times to retrain and verify settings (XMP enabled, etc.).
 

zerijelly

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Jul 5, 2016
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1,113
Have you rolled back to BIOS 7D31v17 to check whether the BCLK show correctly in CPU-Z and HWiNFO?
 

Ezmafl

Member
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Dec 4, 2021
Messages
54
Have not tried rolling back, 7D31v18 seems to be working great, so hesitant about rolling back.

I started forcing 100.25 as my bus clock either with v16 and v17; that would result in 100.0 on CPU-Z/HWInfo. If set "Auto" or forced 100.0 with those prior BIOS revisions, both programs would register 99.76 or similar. I don't think any performance was lost, but it didn't help one's OCD.

With v18, I was surprised that they added the BCLK 100mhz Lock On feature in the BIOS. HWInfo/CPU-Z both report a 100.0 bus clock when that new feature is set to Enabled and the bus clock is set to 100.0 or Auto. Seems like many people must have written them about the fluctatuation.
 

Svet

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Nov 20, 2003
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It's expected behavior due Intel 600 series BIOS code limitation.
The root cause for the CPU Base Clock deviation is because of the BIOS on Intel 600 series platform has "Spread Spectrum" function takes action in the background of the Intel BIOS code which causes CPU Base Clock’s value lower than the setting in the BIOS when checking via 3rd party software(HWiNFO64, CPU-Z) in the Windows.
From Intel’s feedback, the "Spread Spectrum" function is not able to be disabled on Intel 600 series platform.
Thus with BIOS default (CPU Base Clock 100.00 MHz) we won't see CPU Base Clock work around 100.00MHz but at 99.80MHz due to "Spread Spectrum" takes action.
 
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