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How to select a PSU to equip with your system
Every purchase requires careful considerations and this applies to buying DIY components for PCs as well. With proper components, one can create a system that runs efficiently with high value. Power supply choice is an integral part in creating this value, so in addition to power output considerations, one needs to also consider other aspects of power supply performance such as voltage regulation and stability.
When choosing a power supply to equip with your operating system, it is necessary to check if its operating temperature can work within your operating system’s temperature requirement. If the operating temperature of the power supply cannot satisfy the operating system’s temperature requirement, then it will result in system instability or reduction in operating life.
How to determine if the power supply can satisfy the operating system temperature requirement?
Every purchase requires careful considerations and this applies to buying DIY components for PCs as well. With proper components, one can create a system that runs efficiently with high value. Power supply choice is an integral part in creating this value, so in addition to power output considerations, one needs to also consider other aspects of power supply performance such as voltage regulation and stability.
Generally speaking, the internal temperature of operating system in a typical case will be around 40℃, but some high-end or overclocked system may reach 50℃. Therefore, a power supply with 50℃ operating system temperature is preferred as this ensures 100% output under this condition. When the case temperature reduces from 50℃ to 40℃, the output rate of power supply can potentially increase by 12%; when the temperature reduces to 25℃, the output rate can increase by 25%. Take SilverStone DA850 as an example, when the operating temperature inside the case is 40℃ the output can reach 950W, while at 25℃, it can top out at 1050W.
On the contrary, if a user equip a 850W power supply rated at 25℃ operating temperature, but use it in a case that reaches 50℃, the real output will not reach the 850W marked on its retailed package. In this situation, the power supply may only have 680W output and loading it above this power level will be considered over loading. To continue using the power supply at this state of over 680W will result in reduced component life in addition to possible system instability caused by over loading state.
In conclusion, when purchasing a power supply, one need to carefully consider its specification that can satisfy the intended system usage. Pricing should not be the first priority.
 
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