For ASUS ROG GL503VD GL503 GL503VD-DB71 FX503 FX503VD-EH73 FX503VD-NH76 FX503VD-WH51 FCN4VBKLFAJN10 Please choose and match according to the shape of the fan, screw hole position, number of leads, plug type and device model. Welcome to consult. The selling fan is 12V 4-wire 4-pin. (Please note that what you need is 12V OR 5 V, 4-wire 4pin OR4-wire 5pin) SXDOOL Electronics Global is a professional shop, so you have no worries.