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.
Which one are you sure about, that you have a xeon, or a 2.6? That will make a difference, of course.
The vid card will be fine in any motherboard with an AGP slot, which is all of them, but you may need ECC memory, or at least want to get ECC for a xeon if that's what you have.
Someone who knows about the mem. please back me up.