Curious what the point of going up to 1200 MHz is for clock speed since anything over 950 throws a crapload of invalid nonces.
Yes, I agree! Go ahead and try it and let us know what happens...

And as always,
TRY AT YOUR OWN RISK!I'm seeing no errors at 850 but my nonce - on average, has dropped from 100% to 99.76%!
WATCH YOUR nonce value. That's the one that counts as it's an indication of VALID shares accepted!...or not ;(
Wolfey2014