Biostar X670E VALKYRIE User Manual page 28

3-3 North Bridge
North Bridge Parameters.
3-3-1 GFX Configuration
GFX Configuration.
3-3-2 Above 4GB MMIO Limit
Select Above 4GB MMIO Limit to 38~43 bits limit. This option works only when 'Above 4G
decoding' is enabled.
28 | 3. Chipset Menu