Hi, just got this new system in for super cheap and wanted to play around with some base clock OCing with the Xeon that was in it.
Looking at the tags there are some which appear to be related to BCLK.
ICC Profile | VarStore: IccAdvancedSetupDataVar | VarOffset: 0x16 | Size: 0x1
Min: 0x0 | Max: 0xF | Step: 0x1
Intel ICC
Clock Frequency | VarStore: IccAdvancedSetupDataVar | VarOffset: 0x2 | Size: 0x2
Min: 0x0 | Max: 0xFFFF | Step: 0x1
Intel ICC
Bclk Change Permanent | VarStore: Setup | VarOffset: 0x87C | Size: 0x1
Enabled: 0x1
Disabled: 0x0
Intel ICC
Bclk Change w/o Reset | VarStore: Setup | VarOffset: 0x87D | Size: 0x1
Real Time change: 0x0
Permanent, no warm reset: 0x1
When checking the NVRAM contents I can see that by default bclk change perm is set which made me assume that these settings were being used.
Further on in this section there was 3x copies of the “Clock Frequency” header. I changed the NVRAM values for all of these to be 102MHz (0x66) which was my initial target, however, it doesn’t seem to have any effect.
Anyone know what I’m missing? Here is a copy of the formatted setup menu.
formatted_Section_PE32_image_Setup_Setup.sct.0.0.en-US.ifr.txt.zip (39.0 KB)
While in there I did enable unsigned UEFI updates, but this is something I want to avoid for now.