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.
X1950 IMO but never used an X850 (perhaps someone else can chime in)
I picked an x1950 pro up a few years ago for a temporary card while I was waiting for another to arrive and it was actually a pretty impressive card for what it was. It held it's own in any source game.
Quite a bit of difference, in shader intensive games.
The x1950 has roughly 2x the pure shader power then the x850 series, and a faster mem speed. ANd it also is SM3.0, which allows some better lighting effects. In bare fill rate, it does lose a little bit.