Hi,

According to the pictures, R2.0 differs from R3.0 by the number of PCIe slots
(maybe some ports will not work) and it looks like they are using a different
SuperIO chip (you may not see the console in the COM port), maybe there are
other differences... Regardless, you can try to run coreboot on your board,
although I recommend analyzing the pad configuration using inteltool (get
a dump of the registers of the gpio controller):

$ sudo ./inteltool -G

and then compare this with the dump from R2.0 -
https://github.com/maxpoliak/inteltool-examples/blob/master/inteltool-asrock-h110m-dvs.log

If there are differences, then you need to fix them in
https://github.com/coreboot/coreboot/blob/master/src/mainboard/asrock/h110m/include/gpio.h

This will avoid possible burnout of chips, transistors or any other elements on
the board.