Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.
You would probably need to shut it off in the ATI CP, I might be wrong, but if you just shut the monitor off, the card will still render the frames as if it were turned on.
I have been running dual monitors on my 9800 np for over 2 years. All I do is play MOHAA and BFV and have never had a problem. Framerates are always at acceptable levels.