What power supply is suitable for my configuration?

Personal opinion is for reference only

280 73W

The motherboard is about 20w

Your memory is about 10w

X1300XT is about 70w

Your hard disk is about 25w

Optical drive or DVD is about 30w

Internal power supply cooling fan: 12V×0.2A=2.4W.

CPU cooling fan=12×0.23A=2.76W.

Chassis front fan=12×0.12A=1.44W.

Chassis rear fans (2 pcs) = 12×0.1A×2=2.4W.

The total power consumption of the fan: 2.4+2.76+1.44+2.4=9W

The total maximum power consumption is less than 250w, so considering that the hardware may be upgraded or added in the future, A 300W power supply is the safest option. The electricity bill is only a few dollars more than 250w per year.

For the purchase of power supplies, you can read the following information:

1. The actual power of the power supply

The power of the power supply is divided into three types: rated power, Maximum output power, peak power

Rated power: There is no specific calculation formula for the rated power of the power supply. The calibration of the rated power of the power supply often uses a cross-load test. The experiment can detect each channel of the power supply. The load voltage drop and ripple coefficient of the main voltage are used to obtain the maximum current of each output voltage. The specific method is as follows: on the premise of not exceeding the maximum current of the output, gradually reduce the load resistance, and measure the load voltage drop and ripple coefficient at the same time. When the load voltage drop and ripple coefficient exceed the allowed range, Record the current value at this time as the maximum operating current. Record the maximum operating current of each output, and then compare it with the power standard set by Intel to determine the rated output power of the power supply. (By analyzing the standards set by Intel, it can be seen that for power supplies, the most important thing is the +5V output, and there is such a rule - 10 times the +5V current value is exactly the rated power value of the power supply. Therefore, In general, the rated power of a power supply can be estimated by this method - multiply the maximum output current of +5V by 10)

Maximum output power: the maximum power that the power supply can output when operating stably. . The actual working output of a power supply with a rated power of 200W is generally higher than 200W. After all, there is a certain difference between the calibration of the rated power and the actual use environment. Generally, the maximum output power of a power supply is 1.3 to 1.6 times its rated power. (That is, the rated power measured above multiplied by 1.3 is the maximum output power of the power supply). The maximum output power is generally the manufacturer's nominal power. The actual output power of the power supply has a great relationship with the temperature of the environment. If the heat dissipation of the power supply is not ideal, its stable output power for a long time will also be reduced. It often cannot output to the maximum power and can usually only work at the rated power. In addition, When the ambient temperature is lower than -5 degrees or higher than 50 degrees, the output power of the power supply will decrease, usually only reaching 50~60% of normal temperature.

Peak power: The power that the power supply can provide in a short period of time (usually 30 seconds), but the power supply cannot work in this extreme state for a long time. Usually the peak power of the power supply can exceed the maximum output power by about 50%. Peak power is meaningless because power supplies generally cannot operate stably at peak output.

2. Each manufacturer’s material selection and production process are different, and the actual “output power” that can be achieved is also different. This is related to PFC and 3C certification.

PFC: The computer is responsible for converting alternating current (AC) into direct current (DC) to provide all power to the host. Therefore, its energy conversion rate is a very important energy-saving indicator. The energy conversion rate of the power supply is not necessarily related to the nominal power. It is the remaining proportion of energy in the process of processing AC to DC voltage conversion by the power supply. This efficiency is basically determined by the power factor correction circuit inside the power supply. PFC (Power Factor Correction)

PFC is divided into active type and passive type. Active type is more energy-saving. (A 400W power supply may have a rated power of 300W if its PFC is passive, and a 350W power supply may have a rated power of 300W if its PFC is active.)

3C: namely "CCC" ", the full name is "China National Compulsory Product Certification". Currently, our country has stipulated four types of 3C certification: safety certification, fire certification, electromagnetic compatibility certification, and safety and electromagnetic compatibility certification. Only products that obtain both safety and electromagnetic compatibility certifications will be awarded the CCC (S&E) mark. This is the true 3C certification!

3. Power supply weight:

You can often tell whether the power supply meets the specifications by its weight. Generally speaking, good power supply casings are generally made of high-quality steel, with good material and thick thickness, so heavier power supplies are made of better materials. The internal parts of the power supply, such as transformers, heat sinks, etc., are better if they are equally heavy. The heat sink used in a good power supply should be made of aluminum or even copper, and the larger the size, the better the heat dissipation effect.

Generally, the heat sinks are made into a comb shape, with deep teeth, wider apart, and thicker teeth, the better the heat dissipation effect. Basically, it is difficult for us to see the heat sink clearly without taking apart the power supply, so the intuitive way is to judge it from the weight. A good power supply usually adds some components to improve the safety factor, so the weight will naturally increase. Inferior power supplies will omit some capacitors and coils, making them lighter in weight.

4. Fan

The fan plays an important role in the heat dissipation of the configuration during the power supply operation. The heat sink only dissipates heat into the air. If the hot air cannot be dissipated in time, the heat dissipation effect will be greatly reduced. The arrangement of the fans plays a decisive role in the heat dissipation capacity. The fans of PC power supplies of traditional ATX version 2.01 and above use outward ventilation to dissipate heat. This can ensure that the heat in the power supply can be discharged in time, avoid heat accumulation in the power supply and the chassis, and also prevent external dust from being emitted by the power supply during operation. Enter the chassis. There are two specifications for fans commonly used in PC power supplies: oil-sealed bearings (Sleeve Bearing) and ball bearings (Ball Bearing). The former is quieter, but the latter has a longer life. Of course, it would be even better if a magnetic levitation fan is used! In addition, some high-quality power supplies will adopt a dual-fan design, such as an 8-centimeter fan installed at the air inlet to speed up the air flow. However, the dual-fan design has a disadvantage: it will increase the heat inside the power supply and cause noise. In this regard, some manufacturers will use high-sensitivity temperature-controlled bass fans. The thermal diodes on the fans can adjust the fan speed according to the different temperatures in the chassis and power supply. The second is to increase the air intake from the air inlet so that the power supply inlet fan is in line with the temperature. The outlet fans run at different speeds to ensure that the hot air generated inside the power supply and the hot air drawn from the chassis are discharged in time. Moreover, the air flow rate that the fan can drive per unit time is directly related to the heat dissipation effect. There is no special instrument. This is difficult to consider, so the problem is generally simply reduced to the fan speed, which is then converted into power and converted into current. Generally speaking, the rated current has become an important indicator when purchasing. Under the same voltage, the greater the current, the higher the fan power and the stronger the wind force. This is also our only judgment criterion when purchasing. Taking the 8cm 12V DC fan used in general power supplies as an example, its rated current is generally between 0.12~0.18A.

5. Wires and heat dissipation holes

The thickness of the wire used in the power supply has a great relationship with its durability. Thin wires often burn out due to overheating when used for a long time. In addition, there are more or less heat dissipation holes on the power supply casing. When the power supply is working, the temperature will continue to rise. In addition to dissipating heat through the fan included in the power supply, the heat dissipation holes are also an important facility for increasing air convection. In principle, the larger the heat dissipation hole area of ??the power supply, the better, but attention should be paid to the position of the heat dissipation hole. Only by placing it in the right position can the hot air inside the power supply be discharged as soon as possible.

6. Design of air suction and air outlets

There are many pores on the casing of the power supply. The hot air in the chassis enters the power supply through these pores and is discharged to the outside. Generally, the air inlet part of the power supply is on the output line side. The power supply with this design can generally directly inhale the hot air near the 5-inch drive. However, the internal structure of the chassis determines whether it can successfully inhale the hot air generated by the boards in the chassis. In addition, another problem with this design is that the airflow between the air inlet and the exhaust fan is exactly where the power supply's inner coil and capacitors are densely populated, which will fundamentally affect the power supply's ability to absorb and exhaust hot air in the chassis. But this design has an obvious benefit, that is, the air sucked in from the outside will flow directly through the heat sink, which can improve the heat dissipation effect of the heat sink. In response to the above problems, some manufacturers have improved on the traditional basis and added grid holes at the bottom of the power supply with a large area. The hot air generated by the board can be directly inhaled through the grille holes, which is not restricted by the chassis structure at all, and its air suction capacity is significantly enhanced. In addition, the internal air duct of this designed power supply is also very smooth, and the space from the air intake grille to the exhaust fan is completely open. The design of the air outlet has a great impact on air flow. Generally, the grilles of the air outlets of power supplies are relatively wide, which greatly hinders the flow of air. However, some power supplies use sparse steel mesh, which further reduces the obstruction to the air while ensuring safety.

High-quality power supply recommendation based on your actual situation:

Huntjia Calm King series: features, good reputation, low noise

Huntjia Calm King Diamond Edition

A few other models are also good:

Century Star Freedom Fighter III

Great Wall ATX-300SEL-P4 (Silent Master)