Practical PC building guide. Most desktop PC builds need fewer tools than accessory bundles suggest. Match each tool to the case, fasteners and component instructions.
Essential equipment
| Tool | Use | Important limitation |
|---|---|---|
| Quality #2 Phillips screwdriver | Most case and component screws | Check head size; excessive force strips screws |
| Smaller Phillips screwdriver | M.2 and smaller fasteners | Exact screw type varies by motherboard |
| Small parts tray | Keeping screws and standoffs organised | Does not replace checking the case manual |
| Reusable hook-and-loop cable ties | Cable routing and serviceability | Keep clear of fans and sharp edges |
| USB installer drive | Installing a supported operating system | Download installation media from the OS vendor |
Optional, not automatically necessary
An antistatic wrist strap can help when used correctly with a suitable grounding arrangement. Avoid working on carpet, handle boards by their edges and disconnect power before working inside the case. Thermal paste is needed only when the cooler lacks pre-applied compound. Never open a power supply enclosure.
Prepare the workspace before opening parts
Use a clear, stable table with good lighting. Keep drinks away from electronics, place screws in a small tray and have the case and motherboard manuals to hand. Handle components by their edges and avoid touching exposed contacts. Work with the system unplugged and follow the manufacturer’s static-electricity precautions. A magnetic-tip screwdriver may help with small case screws, but keep track of every screw so none is left loose inside the enclosure.
Common installation mistakes
- Wrong standoffs: Match the motherboard mounting points; an extra standoff in the wrong position can cause damage.
- M.2 fasteners: Some boards use tool-free latches while others require a small screw; do not force a screw of the wrong thread.
- Cooler installation: Check the exact socket mounting kit, thermal compound and tightening sequence.
- Power connectors: PSU modular cables are not universally interchangeable between power-supply models. Use only the supplied or explicitly compatible cables.
- First boot: Keep the motherboard manual available for diagnostic LEDs and memory-training delays before assuming the system has failed.
What not to buy automatically
Large screwdriver sets, electric drivers, compressed-air gadgets and premium thermal compounds are optional. Start with the exact fasteners and tasks required by your build. A powered driver can overtighten small PC screws; use careful hand tightening unless the manufacturer explicitly specifies otherwise. Avoid opening or repairing the inside of a power supply, where hazardous stored energy can remain.
Before you power on
- Check that the CPU cooler is secured and its fan or pump is connected as instructed.
- Confirm motherboard, CPU and graphics-card power connectors are fully seated.
- Make sure no cable can touch a fan and no loose screw remains inside.
- Check RAM seating, monitor connection and the case power-switch header.
- Follow the motherboard’s supported BIOS and memory settings rather than guessing.
Where to shop
iFixit tools UK · Scan UK PC hardware retailer. These are general shopping routes; select the exact tool required and verify seller stock.
Related: Case fans · Build Your Setup.
What our PC-build tool comparison tells us
We evaluated tools against the actual sequence of assembling a modern desktop: opening the case, mounting the motherboard and cooler, installing an M.2 drive, managing cables and checking the final build. That reveals why an expensive “100-piece PC kit” often adds little value. A comfortable magnetic-tip Phillips screwdriver, a suitable small driver, a parts tray and reusable cable ties cover many builds; the case and cooler manuals determine any special fasteners.
Thermal paste is not automatically an extra purchase: some coolers include it or arrive with paste already applied. Likewise, a powered screwdriver can cause more trouble than it saves around small fasteners if torque is poorly controlled. Antistatic precautions are about sensible handling and a suitable working environment, not buying the most elaborate accessories.
Our recommendation: check your component boxes and installation manuals first, then buy only missing tools. Spend the savings on dependable components, not decorative tool bundles. We have not physically tested or durability-ranked the kits linked in this guide.
Reference: iFixit repair and disassembly guides for model-specific tool needs; the motherboard, cooler and case manufacturers remain authoritative for assembly instructions.
