Intel MEBX User Guide for Intel 7 Series Chipset

Intel® ME Manageability Features
The scenarios that result in Intel
®
MEBX displaying CPU Replacement related
message to End User are:
1) When CPU Type was Downgraded, e.g. from CORE (vPro eligible) CPU to
PENTIUM CPU or from Core (Non-vPro eligible) CPU to CELERON CPU.
In this scenario Intel® ME FW will request End User Approval since Intel
®
ME FW feature set strongly relies on plugged in CPU TYPE. The message is
displayed to guard End User before unintentional CPU downgrades which
would automatically result in loosing Intel
®
ME FW feature set, for example
un-configuration of AMT Feature Set. Instead, End User has option of either
accepting CPU change or rejecting it before Intel
®
ME FW triggers System
Features reconfiguration. If End User decides to reject the CPU change, it is
required to shut down the platform and replace original CPU. If no End User
interaction is provided then after 10 seconds wait time, Intel
®
MEBX will
follow up assuming End User accepted CPU change.
The following exceptions capture when Intel® ME FW will not request CPU
Replacement confirmation from End User (and the CPU Replacement message
will not be shown):
1. When system is in Manufacturing Mode Intel® ME FW doesn’t expect any
messaging from user – in other words it’s assumed to be informed
change in CPU.
2. First boot after flashing in ME Region – Intel® ME FW doesn’t expect any
CPU replacement related flows that require user assistance
3. Clearing CMOS will cause ME un-configuration, any CPU change after
clearing CMOS will not be considered as upgraded or downgraded from
user perspective.
2) When CPU Type was upgraded and new system features are enabled Intel®
ME FW doesn’t expect any CPU replacement related flows that require user
assistance. The examples of such an upgrade are:
a. CELERON CPU changed to PENTIUM CPU
b. CELERON CPU changed to Core (Non-vPro eligible) CPU
c. CELERON CPU changed to CORE (vPro eligible) CPU
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