yes they will fit your mobo however an h100 is a dual fan radiator therefore your case will need to support it by having enough space and mounting brackets. and as far as how far can you OC? well that depends on some bios setting, cooling (obviously), and well how good of a piece of silicon you have. you should be able to get it to 4.5 or 4.7 without too much trouble and possibly 5ghz.