Building a PC for the first time involves picking compatible parts using a tool like PCPartPicker, gathering a few basic tools, and following a specific assembly order: CPU and RAM onto the motherboard first, then the motherboard into the case, followed by the power supply, storage, and graphics card.
- Use PCPartPicker to confirm every part is compatible before buying anything.
- Install the CPU and RAM onto the motherboard before mounting it in the case.
- Ground yourself and work on a hard, non-carpeted surface to avoid static damage.
- Test the build outside the case first if you’re worried about a no-boot issue.
Step 1: Choose Compatible Parts
See how to choose PC parts that work together for the full compatibility checklist. In short: match your CPU’s socket to your motherboard, confirm your case fits your motherboard’s form factor, and check your power supply’s wattage against your GPU and CPU combined.
Step 2: Gather Tools and Prepare Your Space
See tools needed to build a PC for the full list, but at minimum you’ll need a Phillips screwdriver. Work on a hard, non-carpeted surface, and touch a grounded metal object periodically to discharge static, following safety guidance from iFixit’s build guides and part compatibility tools on PCPartPicker.
Step 3: Follow the Correct Build Order
See PC build order for the complete sequence, but generally: install the CPU, then RAM, onto the motherboard while it’s still outside the case, since this is far easier with full access on an open table. Then mount the motherboard, install the power supply, add storage, and finally the graphics card.
Step 4: Install the CPU
Follow how to install a CPU carefully, since bent pins are one of the most common first-build mistakes, covered in guides on bent CPU pins. Align the CPU using the notch markers, and never force it into the socket.
Step 5: Install RAM and the CPU Cooler
Install RAM into the correct slots for dual-channel operation, following the correct RAM slot pattern for your board, then mount the CPU cooler, applying thermal paste if it isn’t pre-applied.
Step 6: Mount the Motherboard and Install the Power Supply
Install standoffs first matching your motherboard’s mounting holes, then secure the motherboard, and mount the power supply.
Step 7: Install Storage and the Graphics Card
Install your SSD into an available M.2 slot or SATA bay, then install the GPU following how to install a graphics card, making sure to connect any required PCIe power cables from the power supply.
Step 8: Connect Front Panel Wires and Power On
Connect the case’s power button, USB, and audio headers, matching each connector per your motherboard manual, then power on. If nothing happens, work through a systematic no-boot checklist.
Tip for nervous first-timers: test the core components, motherboard, CPU, RAM, and power supply, outside the case first on a non-conductive surface before final assembly, so a no-boot issue is easier to diagnose without disassembling a fully built case.
Frequently Asked Questions
What order should I install parts in when building a PC?
Install the CPU and RAM onto the motherboard first, then mount the motherboard in the case, followed by the power supply, storage, and finally the graphics card.
Do I need special tools to build a PC?
Just a Phillips screwdriver at minimum, though a few additional basic tools make the process more comfortable.
What’s the most common first-build mistake?
Bending CPU pins during installation by forcing the chip instead of aligning it carefully with the socket’s notch markers.
Should I test the PC before fully closing the case?
It’s not required, but testing outside the case first makes troubleshooting a no-boot issue significantly easier if one comes up.
