Some sellers advertise a – this is usually a flash drive pre-loaded with a custom BIOS and Windows installation files. Do not pay extra for this. You can create one yourself by downloading the Rufus tool and the official ISO for Windows 10 (or 11 with bypass), then dragging the MR9A_TOP.bin file onto the drive.
The "Top" modded BIOS tends to corrupt the CMOS if you use "Save Profile" after a failed overclock. Always write down your settings or use F11 for a one-time boot menu. machinist x99 mr9a pro bios top