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Chapter 4: BIOS
North Bridge
North Bridge Conguration
Above 4GB MMIO Limit
Use this setting select Above 4GB MMIO Limit to 38 to 43 bits limit. This option only works
when "Above 4G decoding" is enabled. Options include 40bit (1TB), 41bit (2TB), 42bit (3TB),
and 43bit (8TB).
Memory Information
These sections are for informational purposes. They display some details about the detected
memory according to each CPU on the motherboard, such as:
• Detected Size (per slot, in MB)
• Current Speed (MT/s)
Trusted Computing
Conguration
Security Device Support
If this feature and the TPM jumper on the motherboard are both set to Enabled, onboard
security devices will be enabled for TPM (Trusted Platform Module) support to enhance data
integrity and network security. Please reboot the system for a change on this setting to take
eect. The options are Disable and Enable.
AMD fTPM Conguration
AMD fTPM Switch
The options are AMD CPU fTPM and Route to SPI TPM.
Erase fTPM NV For Factory Reset
When New CPU is installed, select Enabled to reset fTPM, if you have BitLocker or encryption-
enabled system, the system will not boot without a recovery key. Select Disabled to keep
previous fTPM record and continue system boot, fTPM will not be enabled with new CPU
unless fTPM is reset (reinitialized), you could swap back to the old CPU to recover TPM
related keys and data. The options are Disabled and Enabled.
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