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.
You will basically want something with 64 PCIE 3.0 Lanes or 16 for each card 8 if you have to, so pretty much a 2011 socket system either x79 (Ivy-E0) or x99. You will probably need a XL-ATX or bigger board for fitting the cards too
The problem with the Maximus VI Extreme is that it will run x16, x8 , x8 , x8 so you may get performance losses (if so tiny) running in that mode