Bios | Machinist X99 Mr9a Pro
To reset the BIOS to its factory default state, either use the "Load Optimized Defaults" option within the BIOS menus, or perform a hardware reset using the JCMOS1 jumper on the motherboard. This is often necessary to clear a problematic configuration that prevents the system from booting.
A USB stick formatted to FAT32 (MBR partition scheme).
: Purchase and install a standard CR2032 coin-cell battery. If the settings still don't save, check the CMOS jumper pin location next to the battery and ensure it is set to the default "Normal" position, not "Clear".
The is highly regarded as a top-tier budget motherboard for the Intel LGA 2011-3 socket. Sourced heavily through retailers like AliExpress, it provides budget builders, homelab enthusiasts, and gamers with access to inexpensive, high-core-count Intel Xeon E5 V3 and V4 processors. machinist x99 mr9a pro bios
: Custom BIOS versions often include "TU PEI" offsets (e.g., -50mv) to reduce heat and power consumption while maintaining performance.
Because of the stock BIOS's limitations, a vibrant community has grown around creating modified BIOSes that unlock the MR9A Pro's true capabilities. These are the most popular types of modifications:
If the NVMe drive is not recognized, navigate to the Advanced Tab -> PCI Subsystems , and toggle NVMe OpROM Enable to ON . Also, disable CSM Launch in the boot menu for proper UEFI detection. To reset the BIOS to its factory default
Despite its value, the MR9A Pro is not without its quirks, many of which are tied directly to its BIOS:
What (like undervolting, ReBAR, or fixing a boot loop) are you trying to achieve?
After flashing, or for general optimization, configure the following settings: : Purchase and install a standard CR2032 coin-cell battery
If your system experiences stability issues or crashes with 4 sticks of RAM populated, look for the submenu and manually set your timings to loose standard numbers (e.g., 15-15-15-35) instead of leaving them on auto. Enabling Re-Size BAR Support
The Machinist X99 MR9A Pro is a high-performance motherboard designed for Intel Xeon E5-1600/2600 v3/v4 series processors. Here's a useful guide to help you navigate and optimize your BIOS settings:
Being a community-driven board, the best support for the MR9A Pro often comes from fellow users:
The Machinist X99 MR9A Pro is a full-size ATX motherboard built for the LGA 2011-3 socket, originally designed for Intel's high-end desktop (HEDT) and server processors. Its main appeal is the ability to use powerful, yet now very affordable, Intel Xeon E5 v3 and v4 series CPUs found in older server equipment.
