i am doing the same thing. i have an el1852g-52w that i am taking mobo, hdd, dvd, and graphics (aftermarket) out of this small case and putting it into a Cooler Master MASTER Storm Enforcer SGC-1000-KWN1 case. i bought a 450w atx psu and wondered the same thing. and from everything i have been told, it should not be a problem at all. They should work together like peas and carrots.