Recently bought 2nd hand Enermax Liberty 620w, it was easily powering an OC E6600 water cooled, 1900XT x2 Crossfire setup, X-Fire sound card, 2 storage HD's, 1 Raptor, fan controller on 2x120mm, one monster side fan/Thermaltake Kandalf and 2x neons.... all that on a 36 amp rated psu, not too bad...