The amazing Micro-Tolerance load regulation technology ensures that the Seasonic PRIME 850 Titanium power supply delivers clean power at all times. Should there ever be an issue with the AC input power, the longer hold-up times of these units provide sufficient buffer to prevent system instability or, in the event of a power outage, allow the operating system to save important data. Thanks to Seasonic's latest fan control design, this unit can operate in fanless mode at up to 45% system load, delighting customers who are looking for a quiet power supply for everyday use.