Question: How do I adjust the shared memory while using Raven Ridge CPU on AM4 platform?(3/1/2018) Answer: Please adjust the "UMA Frame buffer Size” under Advanced\North Bridge Configuration:
*To support 4GB shared memory or above, please adjust CSM support to Disable under Boot tab firstly.
If you don't see ”UMA Frame buffer Size” under North Bridge Configuration, please follow the steps below to find it and adjust the OC settings.
1. Please press "F2” or "Del” during POST to enter BIOS setup
2. Refer to the following path to adjust the OC setting.
a. Advanced\AMD CBS\NBIO Common Options\GFX Config IGC :Forces
b. Advanced\AMD CBS\NBIO Common Options\UMA Mode : UMA_Spec
c. Advanced\AMD CBS\NBIO Common Options\UMA Frame Buffer Size: Choose a prefer size
d. OC Tweaker\OC Mode Change Switch\AMD CBS Setting
3. After adjustment, press "F10” to save the configuration.