3200 speed is the speed at which the motherboard will boot into the bios.
Once in the bios, you can increase the ram speed up to the speed at which the ram was sold.
Picking a XMP profile is likely the easiest way to do that.
As to the case, I see that it has a 140mm front intake fan and a 230mm side intake.
That should be plenty for a hot processor and a hot graphics card.
At least, you can try it out first.
3200 speed is the speed at which the motherboard will boot into the bios.
Once in the bios, you can increase the ram speed up to the speed at which the ram was sold.
Picking a XMP profile is likely the easiest way to do that.
As to the case, I see that it has a 140mm front intake fan and a 230mm side intake.
That should be plenty for a hot processor and a hot graphics card.
At least, you can try it out first.