Like its X-Series predecessors, the new Seasonic X-1250 power supply incorporates several significant advances in PC power supply design that result in excellent performance, high efficiency and the ability to operate in silent-fanless mode at lower power levels. Add to that an excellent assortment of all modular cables, tight voltage regulation, clean DC outputs and you have one very good power supply."
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips