The LS series power supplies from BFG are middle of the road units. They have all fixed cable units (as opposed to modular cable units on the MX series) and feature four 12V rails cooled with a single 135mm fan. The GS series are positioned to be lower wattage and lower budget units with a 120mm fan, while the ES line feautures a 135mm fan and leads the pack in wattage and efficiency due to its Frequency Conversion technology. But we're not here to explore everything about BFG, so let's focus on the task at hand: the LS-680W power supply.