Seeking the reality room: Which location is the best effect of buying a fan out of the chassis?

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1 Experimental purpose and preparation work back to the top

【PConline for the Period】

DIY computer hosts are naturally indispensable. I believe that many people have encountered the case of giving away chassis fans when buying a chassis. Many times the gifts have only one fan, but the chassis has a lot of fan positions. Where this fan is installed to get the biggest results, it is a problem worth thinking about.

Today, let’s test. When there is only one chassis fan, we can get the greatest heat dissipation effect in which position to install it.

Before the experiment, let’s learn about the relevant physical phenomena: the cold air in the case will decline, and the hot air will rise. In a traditional tower case,

After the air absorption of the air around the graphics card, it will rise to the CPU radiator, which will affect the CPU radiator

求真实验室:买机箱送的风扇装哪个位置效果最好?

Essence In the same way, the air near the CPU radiator will rise after the fins are rising. Of course, this is the air flow without other auxiliary fans.

Preparation before experiment

求真实验室:买机箱送的风扇装哪个位置效果最好?

Next, look at what hardware our experimental instruments are today:

求真实验室:买机箱送的风扇装哪个位置效果最好?

The first is the most important test environment: the chassis. This experiment uses the Hangjia GX600P chassis. Its front panel has 3 fan positions, 2 fan positions on the top board, and one fan position on the back. The specifications of these 6 fan positions are 12cm.

The chassis fan uses the overclocking three -lit version of the Haoyue 12cm fan. The product introduction says that the maximum speed of the fan is 1800rpm, plus the controllable RGB light effect, the price is also very reasonable.

Temperature test environment

CPU

Core i7-7700K

求真实验室:买机箱送的风扇装哪个位置效果最好?

Graphics card

求真实验室:买机箱送的风扇装哪个位置效果最好?

Seven Rainbow Igame GTX1070TI JD JOY EDITION

Motherboard

ROG MAXIMUS IX Formula M9F

Memory

Zhichic Trident Z RGB DDR4-3200 8GB

power supply

Haiyun G450

CPU radiator

求真实验室:买机箱送的风扇装哪个位置效果最好?

Overclocking Sandonghai X5

求真实验室:买机箱送的风扇装哪个位置效果最好?

Chassis fan

Haoyue of overclock

testing software

AIDA64 (single baking FPU) FURMARK (1080P window)

In order to make the temperature change more obvious, the smell master resolutely chooses a higher heat configuration.

4 nuclear Rui frequency to 4.4GHz

Core i7-7700K and the Seven Rainbow GTX 1070TI Jingdong Edition at the same time

20 minutes of AIDA64 and Furmark

Make a lot of calories inside the chassis.

The host of this experiment is a master of scent of professional physical knowledge (forgotten).

2 The heat dissipation effect when the chassis fan is installed at different positions back to the top

Experiment start

Let’s take a look at the machine assembled in this experiment (just ignore the wiring or something, after all, it is not the point).

The six fan of Hangjia GX600P has been mentioned above. There are a total of 6 parts in this experiment, namely: no chassis fan test temperature, the test temperature of the three fans in the front panel, the test temperature of the backplate rear fan seat and the back fan position of the back fan. The three tests of the front panel, the fan blows the air inside the chassis; the test of the top board and the back, the fan pumps outside the chassis. As for why not testing the chassis fan in the front plate, because this position does not effectively help the CPU radiator for dissipation, more of the heat generated by the discharge part of the graphics card.

Inorganic case fan comparison experiment

The CPU temperature is 83 ° C and the maximum temperature is 84 ° C. The graphics card temperature is 74 ° C, and the maximum temperature is 74 ° C. Since the CPU and GPU bakers at the same time, the temperature of the two will affect each other, especially the temperature of the CPU will be greaterly affected. Therefore, at this time

The temperature of the CPU baking machine will be much higher than the usual single CPU

Essence

Put the chassis fan on the front board

The chassis fan is installed at the bottom of the 360mm fan position

求真实验室:买机箱送的风扇装哪个位置效果最好?

(Referred to as 360)

The CPU temperature is 84 ° C and the maximum temperature is 84 ° C. The graphics card temperature is 70 ° C and the maximum temperature is 70 ° C. At this position, the chassis fan was drawn from the outside and blowing directly to the graphics card. Compared with the temperature of the first set of data graphics cards, it decreased by about 4 ° C. The effect was quite obvious. However, the temperature of the CPU has not changed, and even it has risen. It can be speculated that because the chassis fan blows the display card

Bring greater air volume

,therefore

More thermal air rises to the position of the CPU radiator, causing temperature effects

Essence The graphics card was blown by low temperature air, and the temperature decreased significantly.

The chassis fan is installed in the middle of the 360mm fan position

(Referred to as 360)

The CPU temperature is 82 ° C and the maximum temperature is 83 ° C. The graphics card temperature is 71 ° C, and the maximum temperature is 72 ° C. When the chassis fan is installed in the middle, the cold air blows the graphics card and CPU radiator at the same time. The data is also quite reasonable. The CPU temperature decreases slightly, and the graphics card temperature is between the first and second groups of data.

求真实验室:买机箱送的风扇装哪个位置效果最好?

The chassis fan is installed at the top of the 360mm fan position

(Referred to as 360)

The CPU temperature is 83 ° C and the maximum temperature is 83 ° C. The graphics card temperature is 72 ° C, and the maximum temperature is 72 ° C. I just saw this data very puzzled, because the environment of this test was eaten and rest through the smell master

Long -term cooling

求真实验室:买机箱送的风扇装哪个位置效果最好?

Essence From this data and the first set of data analysis, it can be speculated

求真实验室:买机箱送的风扇装哪个位置效果最好?

The influence of the fan fan on the CPU radiator is not great

Instead, the heat generated by the graphics card has a greater impact on the CPU temperature. The graphics card temperature is affected by the accumulation heat of the case,

Strengthen the air flow near the back panel to effectively reduce the graphics card temperature

The top board 240mm fan is installed with chassis fan

The chassis fan is installed at the back of the 240mm fan position

(Referred to as after 240)

The CPU temperature is 82 ° C and the maximum temperature is 82 ° C. The graphics card temperature is 71 ° C, and the maximum temperature is 72 ° C. When the chassis fan is installed in this position, its role is to pull out the hot air inside the chassis from above, especially the hot air from the back of the CPU radiator. You can also take away the hot air from the graphics card. From the test data, you can also see that this fan is effective. It seems that the temperature of the CPU and graphics cards is very affected by the accumulation of heat inside the chassis, reducing the accumulation of heat than blowing in cold air.

The back of the chassis is installed with a chassis fan

The chassis fan is installed on the back of the chassis 120mm fan position

(Referred to as the back)

求真实验室:买机箱送的风扇装哪个位置效果最好?

The CPU temperature is 76 ° C and the maximum temperature is 78 ° C. The graphics card temperature is 67 ° C, and the maximum temperature is 67 ° C. In the last test, we got the best data, and the temperature of the CPU and graphics cards decreased significantly, which can be clearly seen

“Pumping away” is much useful than “getting into the cold wind”

Essence Moreover, from the last two sets of data, the heat air directly removes from the back than the cooling effect that removes from above. It is speculated that the upward wind will interfere with the side blow air flow of the CPU radiator. At the same time, we can be sure,

The accumulation of heat inside the chassis greatly affects the temperature of each hardware

3 Experimental data analysis and summary back to the top

Analysis and summary

求真实验室:买机箱送的风扇装哪个位置效果最好?

List of each fan location

You can see from multiple sets of data,

求真实验室:买机箱送的风扇装哪个位置效果最好?

Fan used as a wind in the wind does not have a large effect on CPU heat dissipation

, CPU radiator itself can be provided

Enough air volume

求真实验室:买机箱送的风扇装哪个位置效果最好?

And the calories generated by the graphics card

求真实验室:买机箱送的风扇装哪个位置效果最好?

Directly affect the fin

,It can be said

The heat of the graphics card affects the effect of the CPU radiator

Compared to the CPU radiator,

求真实验室:买机箱送的风扇装哪个位置效果最好?

Entry fan has a greater effect on the graphics card

, A large amount of cold air blowing the display card can effectively take away the heat, below the graphics card

No heat source interference

(The heat of the power supply is discharged directly from the chassis and does not enter the main board warehouse.) The effect of the fan in the fan is particularly significant.

However, we see that in the last two sets of data, the effect of pumping fans is stronger than the fan fan, which shows that

The accumulation heat of the chassis affects the temperature of the graphics card and CPU

求真实验室:买机箱送的风扇装哪个位置效果最好?

Fasting the hot air out of the case is much better than sending the cold air into the chassis.

Essence To ensure that the air duct of the fan fans does not interfere with the air duct of the CPU radiator, but to enhance the air duct of the CPU radiator. This effect is the best.

From the figure, we can see that the heat generated by the graphics card rises directly, and some will interfere with the CPU radiator and memory, and the CPU radiator also has a small amount of heat rising, but

Most of the calories of the two are moved from right to left by the air duct generated by the CPU radiator.

Essence This is the reason why the fans are drawn on the back.

After 6 tests, I believe everyone knows where to get the best cooling effect when you have only one chassis fan in your hands? If you don’t understand, you can leave a message in the comment area below.

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