Glad to hear. May I ask if you did something specific to get your IGPU going? Or it was working by default? Did you set everything in BIOS and boot windows first time without any GPUs plugged in PCIE? Also did you update bios to latest F25? I saw changes are minor and didn't bother as my mobos had the latest F24 version already.
Just trying to find the missing piece of the puzzle as I've assembled two of those rigs with same components and I have the same problem on both.
My bios is one version behind. At first, I was using the first GPU for the monitor, and lately learned that it affected my hash, so I moved the monitor to the IGPU and just changed it in bios and that's it.