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.
Here's an article on CF between P45 and X48.
Intel P45 Vs. X48 Crossfire Performance
Author: Shane Baxtor
SUMMARY: We take the time to analyze the difference between the x8 / x8 configuration on the P45 and the x16 / x16 on the X48...
Here's the same setup but with Foxconn P35A which had PCIe 1.1 16x and 4x slots.
You can see the difference. :) Having two PCIe 2.0 16x is much better don't you think? :)