True power consumption
PowerSupplyCalculator.net offers you the most accurate PC power consumption calculator on the web for free.
It's a must tool for estimating the power consumption of a modern desktop PC.
It can be used to select a proper power supply unit for your system. It can also be used to calculate the cost of electricity as well as optimize the parts for energy efficiency or low noise levels.
The calculator estimates both the idle and full load power consumptions and recommends a PSU wattage rating for the selected components.
How does it work?
A typical PSU calculator works by calculating the power requirements from the Thermal Design Power (TDP) values from some main parts on the system. However TDP is only a specification of how much power the cooling system should dissipate for the component to stay within the thermal limits in extreme conditions. Many assumptions and predictions has to be made to give you a rough estimate of the total system power. In many cases, that's not the actual power. We on the other hand, have gathered thousands of results from various real-world benchmarks and manufacturer data sheets to extract the real power of these components. By doing so, we can increase the accuracy significantly and also estimate the idle power consumption of the system.
To be noted
We assume the system has a single monitor attached to the GPU. If you have a multimonitor setup, the results may vary.
We assume the system is working in a power saving mode if available.
We assume the system fans are temperature controlled.
We do not take the system start-up power surge into account. Systems with numerous hard drives may encounter a large start-up power peak.
When selecting a proper power supply unit, pay attention to the +12V rail power ratings. Modern computers use the 12V rails to generate most of the voltages in the system.
February 13th, 2014 Added over 100 hard disks and SSD drives. Added 200mm fan
February 19th, 2014 Added over 200 older CPU models. Added CPU overclocking options.
April 15th, 2015 Added many new CPU, GPU and SSD models.