Looks like you bought an engineering sample, and it is quite risky to upgrade BIOS on an engineering sample...
There is no way to get any BIOS ROM file, because the ROM file will not include any AA#, SN and MAC address.
I'm not pretty sure about this...
Since for many motherboards it is able to use a EEPROM programmer to rescue a broken BIOS.
Maybe they know which block not to overwrite, or maybe the S/N and MAC address is stored in a separate NVRAM?
Not sure what is the case for Intel boards though.
I guess my best try is to buy another second-handed board and clone the BIOS image,
but I just really don't need another spare motherboard...
Anyone have experience with Intel support center?
Are they able to help with this kind of situation if I'm willing to pay a few bucks?