They can but the data on the chip is a combination of machine specific identifiers, config data, and BIOS code. If you chip flash it you have to get an image from some sketchy place and it will nuke your serial number etc. You can also have problems if your RAM is made by a different manufacturer. Chip flashing is a last resort.
That's enterprise computing for you.
Been bitten by that kind of shenanigan more often than I can remember.