How to install the host power supply
In the DIY computer assembly process, the installation of the power supply is a critical step. Correct power supply installation not only ensures stable operation of the computer, but also avoids safety hazards. This article will introduce the installation steps of the host power supply in detail, and attach recent hot topic data for reference.
1. Recent hot topic data (last 10 days)

| Ranking | topic | heat index | Main platform |
|---|---|---|---|
| 1 | RTX 50 series graphics cards revealed | 9.8 | Weibo, Tieba |
| 2 | Windows 12 preview leaked | 9.5 | Zhihu, Bilibili |
| 3 | Domestic CPU performance breakthrough | 9.2 | Toutiao, Hupu |
| 4 | SSD prices continue to fall | 8.7 | chiphell, what is worth buying? |
| 5 | AI water cooling system launched | 8.5 | Douyin, Kuaishou |
2. Preparations for power installation
1.Tool preparation: Phillips screwdriver, cable ties (for cable management), anti-static bracelet (optional)
2.Confirm power supply specifications: The standard size of ATX power supply is 150×140×86mm. Chassis compatibility needs to be confirmed in advance.
3.Safety precautions: Disconnect all power supplies before installation, and touch metal parts to discharge static electricity
3. Detailed installation steps
| steps | Operating Instructions | Things to note |
|---|---|---|
| 1 | Determine the installation direction | Fan facing downward (with air inlet holes at the bottom) or inward (older chassis) |
| 2 | Align the screw holes | The standard ATX power supply is fixed with 4 screws |
| 3 | Preliminary fixation of power supply | First tighten the two screws diagonally, do not tighten completely |
| 4 | Connect to motherboard for power supply | The 24pin main power supply interface has a fool-proof design |
| 5 | Connect CPU power supply | 4+4pin or 8pin interface, pay attention to the buckling direction |
| 6 | Connect the graphics card to power | 6pin or 8pin interface, high-end graphics cards may require multiple interfaces |
| 7 | Connect storage devices | The SATA power interface has an L-shaped fool-proof design |
| 8 | Fixed cable management | Use cable ties to organize wires and keep air ducts clear |
4. Frequently Asked Questions
Q: Which direction should the power supply fan face?
A: In most cases, it is recommended to point the fan downward and draw air through the air inlet at the bottom of the chassis. However, if there is no opening at the bottom of the chassis or it is placed on carpet, it can be installed facing inward instead.
Q: What is the difference between modular power supply and non-modular power supply installation?
A: The module power supply requires manual connection of the required wires, and the power supply needs of the accessories need to be planned before installation; all wires of the non-module power supply are fixed, which may increase the difficulty of cable management.
Q: What will happen if the power supply is insufficient?
A: Problems such as random restarts, blue screens, and reduced graphics card performance may occur. It is recommended to leave 20% power headroom, especially when using high-end graphics cards.
5. Inspections after installation
1. Confirm that all interfaces are fully inserted and locked
2. Check whether the wires prevent the fan from rotating
3. When starting up the computer for the first time, it is recommended to perform a short-circuit test first (use a paper clip to connect the green wire of the 24pin interface and any black wire)
4. After entering the system, you can use software such as HWMonitor to monitor voltage fluctuations.
With the above steps, you should be able to successfully complete the power supply installation. If you encounter problems during the process, you can refer to recent discussions on popular hardware forums or consult professional technicians. Correct power supply installation is the basis for stable operation of the computer, and it is worth spending time and careful operation.
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