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.
In a single processor system? Not really since the 990X is going to do the exact same thing for quite a bit cheaper. For gaming unless this is a old build I really would not recommend either the 990X or the X5690. Just go with SB and call it a day for gaming.
For gaming I would focus on the Intel® Core™ i5-2500K as very few game out right now can take advantage of more than 3 threads. Because of this the value of hyper-threading and the extra cores on the Intel Xeon® X5690 won't have much value in a gaming environment.