I've just completed a fairly large upgrade of my PC (new m/b, cpu, and graphics card). All seems to be running nicely expect that I've just had the 13 Amp fuse blow on the power lead. No damage done, thankfully, but I'm suddenly worrying if I'm asking too much of of my old PSU (its a 620W Enermax Liberty unit, about 4 and a half years old). The PC was idle at the time the fuse blew, and nothing else in the house tripped over. My nex spec is (and nothing is overclocked): AMD FX-6 Six Core 6200 3.8 Ghz Gigabyte 990FXA-UD5 Crucial Ballistix DDR3 PC3-14900C9 1866MHz Sapphire HD 6850 2048MB 5 Hitachi SATA HDD's (various sizes, all present before the upgrade) Creative Labs Audigy 2ZS (also from the old build) Is the current power supply good enough, or should I get something bigger?