There are a lot of power posts, the landlord intends to simply explain, do not quote other parts of the paragraph, all original.
Speaking of the CPU is like the brain, then the power is an appropriate analogy is the heart, can imagine the importance of power in the computer, I directly into the subject below, I will bring you a simple and straightforward power introduction.
1, look at the power nameplate: What is the power nameplate?
This is a HuntKey power source that I randomly selected in Jingdong. I marked the important parameters with red, yellow, green, and purple circles. As shown in the figure above, the power output is divided into +12V, +5V, and +3.3V. , -12V, +5VSB, then what do these represent?
Most users generally only look at the red part, which is written with +12v and 35A. In the current desktop host, the CPU (all +12V) and the graphics card (most +12V) are the power consumption in the computer. The biggest place. The 420(w) that we obtained with 12×35 is the maximum CPU and graphics power that this power supply can provide. In other words, in theory, the power consumption of the CPU plus the graphics card can add up to 420W. power supply. As for the other three parts, generally do not need too much attention, local tyrants please buy expensive.
2, rated power VS peak power: or this power
By analogy, the rated power is the normal real power; and the peak power is the power that can be provided in a short period of time, and attention must be paid to the false propaganda of certain power supplies.
3, on the multi-channel 12v and single-channel 12v: Here are two pictures for everyone to see,
Do not know what you see is not what, Figure 1 and Figure 2 used out of the yellow circle is the difference between the jumper450b and 450s, one is a single output, and the other is a multi-output, then reflected in what the difference What? We mentioned above that the 12V power supply is mainly for the CPU and the graphics card, and the single output is the maximum that the CPU and graphics card power consumption cannot exceed 12V, and we see that the 450S is not only the dual output, but also the 12V. The maximum output power has also been reduced to 384W.
Let's take an example. Take the configuration of the landlord, e3 1230 V3 plus MSI 970. Let's take a look at the power consumption of e3.
The power consumption is 80W. The power consumption of the MSI 970 peaks at around 180W. The 216w obtained from the 12×18 in Figure 2 is larger than the 180W dual-channel power supply to the graphics card and the CPU. However, the landlord does not recommend this kind of power supply because this time 12V V1 part of the load is larger, some dual-channel power load will appear after a large load whistling or even a black screen can not boot (such as nx450 with 970), I am not alarmist, but there are many examples, the landlord personally think that to buy a single output comparison OK, but if you have a low-power graphics card such as the 750ti and 1050, then the single-channel dual-channel problem is not significant.
4, 80PLUS and Conversion Rate: Baidu said above, “The 80 PLUS project is a national energy-saving cash incentive program promulgated by the U.S. Department of Energy. Initially to reduce energy consumption, encourage system vendors to choose between desktops or servers. Equipped with full-load, 50% load, 20% load efficiency above 80%, and under rated load condition with PF value greater than 0.9.The U.S. government pays for itself, for the above requirements, the desktop each system rewards 5 US dollars For the server, each system is awarded $10."
The landlord here introduces it in a relatively simple way. The first thing that everyone needs to understand is that the desktop power supply has a conversion rate problem. For example, if your computer's power consumption is 200W, the power consumption on the socket is more than 200W, which will be exceeded. Because the power supply itself consumes some power, then this When the 80plus appears is to protect the environment, save energy, if your power conversion rate is high, then consider that there will be incentives for environmental protection and give you a sign. Let's take a look at how different conversion rates are for different cards.
We can see that there are five paragraphs, white, copper, silver, gold, and platinum, but now we have developed a titanium gold, but the price is moving. If it is local tyrants, please directly on the titanium power supply, buy the most expensive, quality Not bad.
From this graph, we can see that the conversion rate of the power supply load is about 50%, which is the most power saving. The landlord came up with chestnuts again, and still took the landlord's e3 plus 970 to say things. In the above we have calculated that the power consumption of the landlord's machine is about 300W (playing GTA5 high effects), and then we take the 600w power supply as an example. Then the power load is almost 50% at this time. If the power supply is white card, actually the power consumption on your home socket is 300 / 0.8 = 375W. If it is a bronze medal, 300 / 0.85 = 353W, if it is a gold medal, 300 / 0.85 = 337, if it is titanium, 300/0.96 = 312.5W. Here you can see the difference in power savings for each brand of 80plus. However, according to the average person's computer power consumption and the duration of daily use, it is not necessary to buy white gold cards from white cards in order to save electricity. . .
Here the landlord would also like to remind you that the 80plus is not an absolute standard for measuring the quality of the power supply. Most of the good power supplies are 80plus gold or higher, but not as long as the 80plus power supply is a good power supply, which we need to pay attention to.
5, PFC active and passive? Wide: active PFC and passive PFC, listen to the name you know you want to choose active PFC, unless you say that you like passive, but we do not have to worry about the election to passive PFC, in general, most of the power above 300W are active PFC ,do not worry.
The active PFC circuit consists of high-frequency inductors, switches, capacitors, and control ICs. The circuit is characterized by its complex structure, but its advantages are: power factor up to 0.99, low loss and high reliability, input voltage from 90V to 270V (wide input), etc. Since the output DC voltage ripple is very small, active PFC is used. The power supply does not need to use a large capacity filter capacitor.
Passive PFC is usually a bulky inductor. The inside of the passive PFC is composed of multiple pieces of silicon steel wire wrapped around a copper wire. Power factor is not very high, can only reach 0.7~0.8, so its efficiency is also relatively low, and the heat is relatively large. Passive PFC is also not useless, its structure is simple, the performance of stability is good, more suitable for low-end power supply, cheaper prices.
Wide and non-wide power supplies, in short, wide power supplies are more suitable for use in regions where the AC environment is relatively complex (rural) and other AC power is relatively unstable. They can guarantee that the AC power can be as low as 110v and continue to supply power. , do not restart. So if you say that your place is less stable and you use your computer more often, if you want to play happily and don’t want your computer to restart from time to time during peak hours, then honestly use a wide power supply. Anti-surge outlets, then you can have fun playing.
Also talk about the relationship between the active and passive PFC width, wide-width power supply are generally active PFC power supply, but not all active PFC power supply is wide-range power supply
6, on the wire:
This is my Zhenhua gx450 power cable parameters intercepted from Jingdong, as for the interface of various components can be found online.
In addition, when the friends who go back line buy power, they must pay attention to whether the length of the wire is enough, otherwise it is a tragedy.
7, on the module: mainly divided into three types: non-module, half module, full module.
To put it plainly, the difference is whether the wire is soldered to the power supply and how much is soldered to the power supply. This is not an introduction.
For the landlord personally, I think that half modules or even non-modules can meet the needs of our average person.
Regarding the relationship between the module and the power supply, generally, most of the good power supplies are module power supplies, and the high-end power supplies are basically full-module power supplies. However, the module power supplies are not necessarily all good power supplies. The HuntKey MVP500 has only three modules. Group interface, if there is another power supply with a similar price but better performance, there is no need to select it for these interfaces. Why not recommend it because the fan is a helicopter. . .
8, on the power performance indicators: including conversion efficiency, output stability (voltage deviation), cross-load, ripple, hold time, temperature rise and noise
The conversion efficiency has already been mentioned above and it will not be repeated.
Voltage deviation is stability, although the nameplate marked +12V, +5V or something, but the actual output process will have a certain degree of deviation, such as +5V may be 5.15V this way.
Ripple: ripple is not easy to affect the life of computer hardware,
Cross-load: The purpose of this test is to check if the 12V 5V 3.3V power consumption ratio is different and whether they can maintain accurate voltage.
Hold time: too short has an effect on hardware life.
Noise and temperature rise are also important factors. Imagine your fans are buzzing and you will feel that you are not at home but at the airport.
9, on the warranty: the general power is a 3-year warranty, a good point of power are 5 years warranty, 7 years and 10 years of money on the warranty, worry.
The mainland is generally a three-year warranty.
Taiwan is generally a 5-year warranty.
Han Shu's power supply warranty for 7 years.
Get on board, 10 year warranty.
10. About noise and fan speed, temperature: Friends who are concerned about noise can buy a low-load-stopped power supply or a fanless power supply.
But even if there is no sound from the power supply, the hard disk is replaced with ssd, not air-cooled, the chassis is not equipped with a fan, the video card fan can't escape, or there will be a voice, don't tell me I bought a GT710 passive cooling, Then I just want to say, old brother, steady!
At present, there are about 8cm, 12cm and 14cm power supply fans, of which 12cm is the majority. General Jingdong will give the fan size parameters, it is recommended to start when the 12cm start, the noise is relatively small compared to 8cm.
11, what does the power supply look inside? : Capacitors, transformer solutions, voltage regulation solutions, circuit board work
Look at the capacitance first: In general, Japan capacitance> Taiwan capacitance> Continental capacitance
Look at the transformer program: LLC Full Bridge> LLC Half Bridge> Dual Forward> Single Forward
Then look at the regulator solution: DC-DC> Dual Amplifier> Single Amplifier
Sometimes these things are said on the B2C website, but more often we need to go online to find evaluations.
Also pay attention to it! Single Zoom Recommend Buying Below 500W
Enter the quick recommendation section below
Within 300w: (For nuclear users or low-end low-power independent display)
Second, 350W ~ 430W (i3 i5 plus 750ti and the like)
Third, 450W ~ 480W (i53 i3 plus 960 970 470 and the like)
Fourth, 500W (i5 plus 970 380)
Five, 550W (i7 overclocking plus 1070 480)
Seven, some instructions (very important)
1, can not only brand theory, for example, some people use a certain type of power supply to say that this section is too bad, and later do not buy, in fact, sometimes we have to rationally look at the problem, there must be like Tian Ji race horse Thinking, the low-end brand may not be as good as the second-tier brand in the high-end, and the other is that we all know that the red star boom, in fact, there is still a red star power good,
However, with this price and 3-year warranty, I can only be discouraged. This price gives me a reason not to buy Zhenhua LEADEX G 550 or Haiyun G550. Therefore, I still think that the Red Star must refuel. . . .
Another example is that many people like modules and want to be cheaper, they will be able to use the MVP500, but the goods fan is more than 50% of the load sound is relatively large, like the landlord can not tolerate too much noise, fan speed compared to the general Power is too fast, I think not jumper500 above, low-end module power really is not as good as a good point of non-module power or half module power supply.
3, personally feel that buying a power supply at least 20% of the margin, how not to buy a power supply in the year under 20% load, if possible, then load as much as 50%, so the conversion rate is the highest.
4. If you take a look at two similar power supplies, which ones will buy them for a long time, most of them are correct.
5, according to the model I recommend above to buy, there is no big problem.
6. Q: How do I see how much power my computer is suitable for?
A: The first step, open this website, HuntKey power calculator
The second step, select your own CPU graphics and other hardware, you can get the appropriate power calculation
In the third step, divide your power consumption by 0.8 to get the rated wattage of the power supply you want to buy.
The fourth step, from the inside I recommend different wattage grades, according to their economic ability to choose the right power.
7, it is recommended that you buy power is not cheap (except for activities), under normal circumstances, the power of 6 hair 1w start, the best 1 yuan 1w
Thank you for your report and feedback. Thank you for your attention. Thank you Xiaobian for editing the article for me at the time of my first release. The next article is about the purchase of the graphics card. I hope you value your friends. Stay tuned.
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