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I purchased a new MTX case because my Aurora case is old and disgusting and the power button doesn't work and the colors around the case barely work. Anyway everything fits except for one thing, the Power supply model: N875EF-00 (Input 100-240V~ 12.5A 50-60Hz, Output 875W MAX.) So I needed help finding a power supply that's the same and will work with all the stock wires and motherboard but is smaller in actual size dimensions. 

Please help,

Paul.