| Variable | Offset | Default | Desired | Comment |
|---|---|---|---|---|
| Above 4GB MMIO BIOS assignment | 0x79A | 0x00 (Disabled) | 0x01 (Enabled) | |
| ACPI Removal Object Suppport | 0x491 | 0x00 (Disabled) | 0x00 | |
| CFG Lock | 0x4ED | 0x01 (Enabled) | 0x00 (Disabled) | |
| CSM Support | 0xFC8 | 0x01 (Enabled) | 0x00 (Disabled) | |
| DVMT Pre-Allocated | 0x795 | 0x02 (64M) | 0x02 (64M) | |
| DVMT Total Gfx Memory | 0x796 | 0x02 (256M) | 0x03 (MAX) | |
| GPIO filter | 0x47B | 0x00 | 0x01 | |
| GPIO3 Force Pwr | 0x45F | N/A | 0x01 | |
| Native OS Hot Plug | 0x479 | N/A | 0x01 | |
| Skip PCI OptionRom | 0x48F | 0x00 | 0x00 | |
| SW SMI on TBT hot-plug | 0x47A | 0x01 (Enabled) | 0x01 | |
| Thunderbolt Boot Support | 0x45B | 0x00 (Disabled) | 0x01 | |
| Thunderbolt Usb Support | 0x45A | 0x00 (Disabled) | 0x01 | |
| Thunderbolt(TM) PCIe Cache-line Size | 0x45E | 0x20 (32) | 0x80 (128) | |
| Wait time in ms after applying Force Pwr | 0x460 | 0xC8 (200) | 0xC8 (200) | |
| Wake From Thunderbolt(TM) Devices | 0x452 | 0x01 (Enabled) | 0x01 |