Machinist X99 Mr9a - Pro Bios
| Submenu | Critical Settings | Recommended Value | | :--- | :--- | :--- | | ACPI Settings | Enable Hibernation | Disabled (for servers) | | CPU Configuration | Hyper-Threading, VT-x, VT-d | All Enabled | | NVIDIA RC (ReBAR) | Resizable BAR | Enable (if using GTX 10xx+) | | USB Configuration | XHCI Hand-off | Enabled | | CSM Configuration | Boot from PCIe NVMe | Legacy + UEFI |
1. Overclocking & Performance Tuning (All in the "OC" or "Turbo" tab)
2. Memory Configuration (Critical for X99) machinist x99 mr9a pro bios
3. Boot & Compatibility
4. CPU Configuration (Advanced Tab)
5. Health / Hardware Monitor
Do not use Windows-based flash tools if you can avoid them; they carry a higher risk of bricking the board. Use the BIOS built-in flash tool. | Submenu | Critical Settings | Recommended Value
Tools Required: A USB stick formatted to FAT32 (MBR partition scheme).
The Process:
| Problem | Details | Workaround | |------|------|------| | NVMe boot disappears | After CMOS reset or power loss, BIOS discards NVMe boot entry. | Reflash NVMe driver via UEFI shell or use Clover/OpenCore bootloader. | | Slow POST (30-60s) | Memory training every boot if Fast Boot disabled. | Enable Fast Boot + Memory Fast Boot (but may cause BSOD). | | Fan control resets | After sleep or reboot, custom fan curves reset to 100% PWM. | Use software like FanControl or SpeedFan in OS. | | SR-IOV/VT-d instability | Enabling IOMMU causes random PCIe device dropouts. | Keep VT-d disabled unless needed for VFIO passthrough. | | No CPU temperature on some sensors | BIOS shows 0°C or 127°C. | Ignore; use HWMonitor in OS. | | RAID not working | Despite Intel RST option, RAID volume fails on reboot. | Use software RAID (Windows Storage Spaces or mdadm). | | S3 sleep wake failure | System wakes to black screen or resets. | Use S4 (hibernate) or disable sleep entirely. |