A Power Supply Unit (PSU) may not be as exciting or glamorous as a brand new graphics card, but that doesn't mean you can skimp out on it. Your power supply is the beating heart of your PC's components, and if you buy a cheap one, it threatens to take out your entire computer!

Asus Power Supply Wattage Calculator

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While models will advertise this number proudly on the box, it might not tell you the full story. Let's say you see a 500W power supply. If it states Continuous Wattage, that's great. If it's the Peak Wattage, you might want to avoid it. You can usually check which it is on the model's specifications page.

The JonnyGuru Forums are packed with reviews and feedback on power supply units and are well worth searching for your PSU make and model. You can also head over to /r/buildapc on Reddit to find out which PSUs people are leaning towards, not forgetting our own roundup of the best PSUs for PC builders.

Generally, more complex systems require more power to run. A desktop with a custom liquid cooling loop, a high-end motherboard, and dual GPUs is going to need a higher wattage computer power supply than a simpler system.

Consider EfficiencyWattage is certainly an important consideration when choosing a desktop power supply, but so is PSU efficiency. Inefficient delivery leads to wasted power and more heat, which can potentially decrease the lifespan of your components.

The important thing to note about ratings is that higher ratings are more efficient at supplying the overall power from the wall to the system. Naturally, both your power bill and the environment will thank you for higher efficiencies, but Gold is a good choice to avoid paying too much extra cash for the higher ratings.

Be sure to shop around for the best prices, as storefronts routinely place items like these on sale. Make sure you also use the power rating calculator above to know which PSU to buy. Choosing the right power supply for your PC can end up saving you a fair bit of money that can be better spent on other components.

These are the recommended websites which provide online power supply calculator for server and desktop computer. This tool used to calculate the estimate wattage of power supply which should be used for computers depends the computer specification.This power supply wattage calculator aims to provide a general idea for the selection of power supply unit based on the system configuration with all added-on devices and components. The recommended power wattage figure is calculated based on the peak or maximum utilization power consumption of installed devices or components.

Load Power Draw - Maximum power consumption measured during a video card stress test (with Furmark being the most popular choice). These values are most useful in helping you choose your power supply wattage.

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.

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. 076b4e4f54