Dell OptiPlex 3050

Config

• CPU: i5-7500
• GPU: IGPU HD630 (DP+HDMI output)
• MEM: 8G x 2
• BOOT: OpenCore 0.5.9
• BIOS: 1.10.3
• OS Version: 10.15.5

Advanced

BIOS Setting

# Set DVMT to 64M
setup_var 0x795 0x2

# Set CFG Unlock
setup_var 0x4ED 0x0

Dual Monitor

Add igfxonln=1 to Boot Args.

Tool

Use modGRUBShell.efi to modify BIOS DVMT and CFG LOCK

Gigabyte Z390 Aorus Elite

Config

• CPU: i7-9700K
• GPU: Dataland RX 590 Plus
• MEM: CORSAIR 16G*2
• BOOT: OpenCore 0.5.9
• BIOS: Version F7(actually F7-F10c all ok now)
• OS Version: 10.15.5

Advanced

BIOS Setting

# Set CFG Unlock
setup_var_3 0x5C1 0x0