Topower PowerBird 1100W ATX12V/EPS12V Power Supply TOP-1100W Design to support Dual / Quad Core CPU, Intel i7 CPU and NVIDIA SLI Modularized cable management to eliminate clutter and improve airflow inside the case Guaranteed to deliver rated specifications at 40 Degree C Thermally controlled 120MM double ball-bearing fan High efficiency 80PLUS certified. Max 87Percentage efficient at typical load