Dell NH493 Power Supply for Dimension E521/E520 Desktop (L305P-01) Compatible Dell Part #'s HK595, HP201, NH493, WU133, XK215, C248C, CY827, F305P, JH994, M360M, MH495, MK9GY, PH333, PW114, WU133, XK376, PF3TR, P192M