"Small series, I installed the machine to buy more power suitable ah? How much power consumption a day?" Today, a small partner asked this question, if you simply reply to a more than 500W power supply can be, it certainly is no problem, but you know the computer How much electricity is consumed? How long can electricity be used by computers once? Let's just say this today.
How long is 1 kWh?
This is difficult to say, should be 1000W power of the appliance full-load operation for 1 hour to 1 kWh, the computer is dynamic because of the operation, the power consumption is not constant, so can not say exactly the degree of power consumption.
The second is that the power supply power is not equal to the power consumption. For example, a 500W power supply does not mean that the computer needs to use 0.5 kWh per hour after the computer is turned on. The 500W power supply can stably work continuously at 500 W power. In addition, the power supply has a peak power consumption. The peak power consumption of a 500W power supply can be as high as 650W, which means that it can receive peak power shocks of up to 650W in a short time. Moreover, the power supply itself has a self-depletion situation, because the power will have a certain degree of loss when converted to different voltage outputs.
This will mention a 80Plus certification problem. The 80Plus certification program is a reward program organized by ecos consulting (now Ecova) to promote high-efficiency energy-saving power sources. Currently, it is divided into six levels: white, bronze, silver, gold, platinum, and titanium. The power conversion efficiency of one level of certification is not the same. For example, the white card certification of 115V Internal requires that the conversion efficiency is not less than 80%, 80%, and 80% at the 20%, 50%, and 100% load, respectively. The PF value at % load must not be less than 0.9 (see the figure below).
Who is the big consumer?
Power consumption is not the largest CPU, although the high-end CPU TDP thermal power design 65W, 90W or even higher, but this is only a thermal power design, it does not represent the real power! The discrete video card is the most power-consuming place in the entire computer, even when the idle power consumption is higher than some CPU's TDP.
The specific ranking of power consumption "capacity" of each component in the computer is as follows:
1. Discrete graphics card
2.CPU
3. Motherboard
4. Hard disk
5. Memory
6. Keyboard mouse
It should be noted that the hard disk is the most afraid of the power consumption of all devices, especially the computer that installs multiple hard disks, and has a high requirement for the peak power of the computer. This should be paid special attention.
How much power is enough?
Computers are different from other electrical appliances. Because of the different load levels of computing tasks, power consumption has always changed dynamically. The exact calculation of power consumption is very difficult. Therefore, many times can only rely on experience to determine, of course, there is an error, the model online there are related solutions. It should be noted that the method provided by Xiao Bian can only be described as exhaustively as possible, but it is also not precise enough. However, as a reference for the optional power supply is absolutely available, through this page power calculator, you can quickly calculate the power consumption of your own computer (rough), but also for the small partner of the machine can also provide power supply power reference.
The method of use is very simple, enter the URL http:// in the browser, enter the power calculator page.
Select your own model (desktop, server, mini PC), motherboard, and so on. Note that some devices have a number option in front of them, which means that you have several of them and must be selected before calculation.
As far as possible, select all the devices that you want to install and use on the computer. Finally, click Calculate in the lower right to calculate. The Load Wattage is the total power consumption of the device you selected. The Recommended PSU Wattage is the recommended power supply. The power level, for example, Xiao Bian calculated this power consumption is 388W, the recommended power supply power is 438W, which is to buy a 450W power supply is better. The first of these concerns the loss of power conversion. On the other hand, it also leaves a certain degree of power redundancy. In case of additional equipment or upgrade, it will not be stuck on the power supply.
