I rolled back to the 2279
I rolled back to the 2279 drivers (they were the ones that came on my motherboard driver disc). The newer ones had the handshake HDMI blank screen boot/minute later blue screen issue.
Whenever swapping motherboards, it’s a good idea to a clean install. The last thing you want is a driver ghost hanging around causing issues. Maybe Windows 7 is better at it, but I know older Windows versions were never happy with motherboard swaps. You probably want your HTPC to be stable so shows get recorded 100% of the time, a clean install will keep you from having worry about the old OS’s stuff being an issue. I don’t know how much RAM you’re putting in your new system but it might be a good time for you to jump to 64-bit. There are several good tools out there to make backing up/clean installs painless.