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.
I had major issues with my QNIX 2710 after I left it on overnight with garbled screen resolution (Funny colors all over the screen). I fixed the resolution problem and the weird image corruption problems went away completely after a couple hours. The issue I had was like a temporary burn-in (like plasmas). Doubt your have the same issue but try a different DL-DVI cable and leave it on for an hour.
Um I disassembled my Qnix qx2710 a while ago and I remember that one cord was not fitted back in all the way and I had the same effect on my screen. All it took was fitting it back in correctly and the screen was back to normal. Perhaps you might consider checking that out before giving up on it.