well i have the extrem 3 and by the looks of it extreme 4 is close but has IDE and floply I would go with the extream 3 990 FX as the sabertooth 990fx is for some overclocking and the extream 3 basicly the same for less unless you have an IDE HDD, an old disk drive that you want to use or an old floply drive that you want to use but that is me
but between the two sabertooth 990fx if money is not a big deal
and as for the 2nd question yes it does