My old PSU in my secondary PC died spectacularly, and I've received my 750w SUPERNOVA G3. I haven't installed it yet, because I have no idea if it took out other MB components, and I have no idea if there are procedures that I should go through before powering on the new one to avoid further damage. 2nd PC specs: Asus P8Z68V-PRO/GEN 3, 2500K, 8Gb Corsair DDR3, 2 Asus Radeon HD 7770 2Gb in Crossfire, and 2 spinny-drives. I know enough, but I need the help of the community to prevent follow-on explosions. Any help youz guyz can offer will be hugely appreciated. If you need more information, I will be happy to provide it. TIA!