The v1.31 BIOS has aged like fine wine. While newer versions (v1.32, v1.33) exist, they tend to introduce microcode security patches that slightly reduce performance. For pure, unadulterated speed, v1.31 remains the community standard.
MACHINIST X99 Motherboard LGA 2011-3 Micro ATX Motherboard For Intel E5 V3 V4 Series CPUs, DDR4 Max 128GB, NVME/NGFF M.2, PCIe 3.0, Gigabit LAN x99-turbo v1.31
While specific features can vary based on the motherboard manufacturer's implementation, the X99 chipset generally supports: The v1