aywun a1-977 black mid tower atx case 320w max power psu aywun a1-977 black mid tower atx case, external:5.25in x4/3.5x1bays, internal 3.5in x6 bays , 7 expansion slots, front audio and usb, 320w max power psu with 12cm fan included, case size 430x185x410mm, room for o ptional 12cm fan in front, can also add optional 8cm fans in side panel and rear mounting locations