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.
Shouldn't be a problem. I ran my x800xl at 100% all the time, and it will keep it a little cooler. Some will say "Oh, but that will make the fans life shorter", but a fan that can't run at it's rated maximum without burning up is crap and will be covered by warranty.