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.
5770 is the faster card in almost all scenarios. the 450 is really a piece of junk. last time i was at bestbuy they were selling 5770s almost $200. they can be had for less than $130 online quite easily. im not sure what your employee discount is, but bestbuy is a ripoff on computer parts 99% of the time so i would look elsewhere.