r00t wrote The XFX Core 550 is a Seasonic S12II, which does not support Haswell's low-power C6 and C7 states, so you will have to leave them disabled. They are not very important for desktops so you're not missing out. 550w is more than enough for this build.

Oh one more thing sorry about the hassle, but the motherboard is micro ATX and the case is just ATX will that be a problem?

The Core 1000 and N200 are both mATX cases, but you can put smaller boards in larger cases.