Are you building a new high-end rig? Use the EVGA 850 GQ Power Supply to run that monstrous system. This unit is SLI and CrossFire ready as well as Haswell ready so you can go all out in your GPU and CPU choices. It has 80PLUS Gold rated efficiency so you are assured that the unit is not wasting any power and generating unnecessary heat. Its modular design is a big help in cable management to ensure your case has enough airflow for your cooling components. The unit uses only 100% high quality Japanese Nippon Chemi-Con Solid State Capacitors so you get the most reliability and performance. The unit also has an EVGA ECO feature which makes the fan spin only when necessary, resulting in completely silent operation during low to medium load.