Corsair CMPSU-850TX 850-Watt TX Series 80 Plus Certified Power Supply compatible with   Core i7 and Core i5 Over Current/Voltage/Power Protection, Under Voltage and Short Circuit Protection provides Maximum Safety for your critical system components 80 Plus Certified for 80%+ Energy Efficiency at 20%, 50% and 100% Load Condition for less Heat Generation and Lower Energy Bill Dedicated Single +12V Rail Offers Maximum Compatibility with Latest Components High-quality Japanese Capacitors provide Uncompromised Performance and Reliability Industry Leading 5 Year Warranty