I've been running my Quanta as a file server for the past few years. It's been a great bargain, but decided to try to update the bios to support a pair of E5-2650 v2 procs. I was able to figure out the process to get V2 support. The nice part is that the system bios is in a holder that can be easily swapped.
I wanted to share my experience as this information is sorely lacking online, however please use care and ensure you backup your original rom .Bin image if you decide to try this. I am not to blame if you fry your system and anger your cat because you lost all of their cat pictures you downloaded.
You will not be able to complete this using the MegaRac BMC to complete this. It may be possible to still do this without removing the BIOS chip from the system, however I have not tested this route.
You will need the following:
128Mbit bios chip - I purchased some Winbond 25Q128JVFQ from Mouser
SPI Programmer - I used a CH341A Usb variant from Amazon or other source
SOP16 300mil Adapter - STAR-SOP 3 in 1 from Amazon or other source
CH341A Programmer software - This can be found online as free download
4A21 Bios from Quanta - You will want the newest version, yes the 16MBit variant
Shut down system, remove all power sources.
Pull out the BIOS chip (the first pin faces the CPUs, there is a small mark on the inside of the holder pointing to the first pin but it is hard to see).
Insert 64Mbit bios chip into CH341A programmer, using SOP16 adapter as necessary.
Make a copy of your original bios .bin file and save this!!!
Set your original 64Mbit bios chip aside somewhere safe!!!
Place new 128Mbit bios chip into CH341A programmer/adapter.
Erase and verify chip has been blanked with software.
Burn 4A21.bin (NOT the .rom) onto 128Mbit bios chip, validate against buffer to ensure it has been written properly.
Insert new 128Mbit bios chip into socket on motherboard - ensure pin 1 is facing towards the cpus.
Clear CMOS on system.
Power up system.
You may need to wait for several power cycles that the system will perform.
If all went well, your system should eventually show you a splash screen.
If you are unable to get this to work, you can always clear CMOS and place your original 64Mbit bios chip back into the system.
In the event this is helpful and further information is requested, please let me know and I will help if I am able to. This should also assist those who have a corrupted bios and are unable to get their system to power up.
Other notes:
The BMC chip is soldered to the motherboard. It is possible to swap this out and use a 254Mbit to allow for v7x BMC firmware (not tested), however after comparing against original firmware release notes it does not seem that there is any if much of a difference and not worth the effort.