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Understanding what each component does and how to choose the right one is the first step to building a great PC.
The backbone of your PC. It connects everything and determines what parts are compatible. Choosing the right one is crucial.
The brain of your PC. It runs your OS, games, and applications. More cores = better multitasking. Higher clock speed = snappier feel.
Your PC's short-term memory. More RAM = more apps open at once. Faster RAM = quicker load times and snappier performance.
Handles all visual output. Critical for gaming, video editing, 3D work, and AI. The most expensive single component in most builds.
Where your OS, programs, games, and files live permanently. Speed matters — a fast SSD makes everything feel instantly responsive.
Converts wall power to clean DC power for every component. Never cheap out here — a bad PSU can destroy your entire system.
Keeps your CPU at safe temperatures. All CPUs come with a basic cooler, but aftermarket coolers are quieter and more effective.
The home for all your components. It affects cooling, noise, size, and aesthetics. Pick a size first, then find one you like.
You'll need a few extras to actually use your new PC. These aren't part of the PC itself but are essential.
Follow these steps in order and your PC will be up and running. Every step includes warnings to prevent damage and tips from experienced builders.
Anti-static wrist strap (or metal surface to ground yourself), clean flat table, Phillips #2 screwdriver, thermal paste (if not pre-applied), zip ties, your parts still in boxes, your phone/camera for progress photos.
A static shock you can't even feel can destroy a CPU, RAM, or motherboard. Always ground yourself before touching parts. Work on a non-carpeted surface. Don't walk around in socks while building.
Take progress photos at each step with your phone. If something goes wrong later, you can reference exactly how things looked. Plus, it's satisfying to look back at your build progress!
Motherboard (outside the case, on its box), CPU, motherboard manual.
The CPU should literally drop into the socket under its own weight. If it doesn't sit flat, you have the orientation wrong. Never force it — bent pins are the #1 beginner mistake and can permanently destroy the motherboard (AM5) or CPU (Intel LGA).
AMD AM5 CPUs have pins on the motherboard socket (fragile!). Intel LGA1700 CPUs have pins on the CPU itself (also fragile!). Either way — never touch the pins and never force the CPU.
Motherboard (with CPU installed), RAM sticks, motherboard manual (for slot configuration).
If you put 2 RAM sticks in the wrong slots (e.g., slots 1 & 2 instead of 2 & 4), you'll run in single-channel mode and lose up to 30% performance. Always check your motherboard manual for the correct dual-channel configuration.
Look at the RAM slots — they're often color-coded (black + black = pair, or white + white = pair). Match colors for dual channel. When in doubt, the manual always has a diagram.
Motherboard with CPU installed, CPU cooler (air or AIO), thermal paste (if cooler doesn't have it pre-applied), Phillips screwdriver.
Too much paste = it squishes out and can get on motherboard components. Too little = poor heat transfer. The "pea-sized dot in the center" method is the safest. Don't spread it with your finger (oils!) — let the cooler's pressure spread it naturally. NEVER run the CPU without thermal paste.
For Intel coolers with a backplate: install the backplate BEFORE putting the motherboard in the case. Once the motherboard is in, you can't reach behind it. Plan ahead!
Motherboard, M.2 NVMe SSD, tiny M.2 screw (usually included with motherboard), Phillips screwdriver (small).
The M.2 screw is EXTREMELY small and easy to drop/lose. Work over a table, not over carpet. If you lose it, any M.2 screw from an old build or the motherboard box works. Some motherboards include a spare. Don't strip it by overtightening.
It's easier to install the M.2 SSD before putting the motherboard in the case. Less room to work inside the case, and you won't have to navigate around the GPU later.
Case (side panel removed), motherboard with CPU/cooler/RAM/SSD installed, I/O shield (included with motherboard), standoffs (usually pre-installed in case), Phillips screwdriver.
Extra standoffs underneath the motherboard can touch exposed solder points and cause a short circuit. Only install standoffs where there are motherboard screw holes. An unused standoff touching the board can kill it when you power on.
If the I/O shield has little metal tabs that block the ports, you can gently bend them inward with a screwdriver to allow ports to fit through. This is very common and normal — many I/O shields are like this by design.
Case, PSU, Phillips screwdriver, PSU cables (if modular).
If the fan faces into the shroud (wrong direction on bottom-mounted PSUs), it will suffocate and overheat. Fan should pull air from outside the case. Double-check before screwing it in.
If your PSU is fully modular, connect cables to the PSU side BEFORE sliding it in. It's much easier to plug them in when you can access both sides freely.
GPU, Phillips screwdriver, PCIe power cables from PSU.
Heavy GPUs can sag over time, putting stress on the PCIe slot and potentially damaging it. Always screw the bracket to the case. For extra-heavy GPUs (RTX 4080/4090), consider a GPU support bracket or anti-sag stand.
Remove the PCIe slot covers from inside the case, not outside. And save them! They're useful if you ever remove the GPU or add a different card later. Store them in the case's accessory box.
Case fans (included with case or aftermarket), fan screws, motherboard manual.
If you mount a fan backwards, it'll push hot air in instead of pulling cool air in. Check the arrow on the side of the fan — it shows airflow direction. If there's no arrow, the branded/stickered side is where air comes FROM (intake).
For a balanced setup: 2-3 front intake fans, 1 rear exhaust fan, and optionally 1-2 top exhaust fans. Don't add more fans than your case can hold, and don't mix too many intake vs exhaust — a slight positive pressure (more intake than exhaust) is ideal.
All cables from PSU and case, motherboard manual (crucial for front panel header pinout).
The power button has no polarity (it works either way). But LEDs (power LED, HDD LED) DO have polarity — the + wire goes to the + pin. If an LED doesn't light up, flip the connector around. The power switch MUST be connected or your PC won't turn on.
Use tweezers for the tiny front panel connectors. They're small and fiddly. Some modern cases use a single unified front panel connector (Q-Connector) that plugs in all at once — much easier. Look for this feature when buying a case.
Zip ties or velcro straps (velcro is better for future changes), patience.
Don't overtighten zip ties around cables — you can pinch or damage wires inside, especially SATA data cables which are delicate. Velcro straps are safer and reusable.
Take your time with cable management — it's the difference between a "looks like a professional built it" PC and a "rats nest" PC. Good cable management also improves airflow,降低 temperatures, and makes future upgrades much easier.
Monitor, keyboard, mouse, USB drive with Windows/Linux installer, internet connection (Ethernet preferred).
The #1 "PC won't display" issue is plugging the monitor into the motherboard's HDMI/DisplayPort instead of the GPU. If you have a dedicated GPU, ALWAYS plug your monitor into the GPU's ports. The motherboard ports won't work when a GPU is installed.
On first boot, if the PC turns on for a second then off, then back on — this is normal! Many motherboards do a "memory training" cycle. Don't panic. If it keeps cycling and never boots, recheck your RAM seating and power connections.
Download HWMonitor or Core Temp to check your CPU temperatures. At idle, you should see 30-50°C. Under full load (gaming, stress test), aim for under 85°C. If temps are high, check: thermal paste application, cooler mounting tightness, and case airflow.
Use this quick reference to check compatibility before buying. The most common compatibility issues are covered here.
| Question | How to Check | What Happens If Wrong |
|---|---|---|
| Does my CPU fit this motherboard? | Match the CPU socket to the motherboard socket. AM5 CPU → AM5 motherboard. LGA1700 CPU → LGA1700 motherboard. | The CPU physically won't fit in the socket. Incompatible by design — can't force it. |
| Will my RAM work with this motherboard? | Check DDR type (DDR4 vs DDR5). Must match what the motherboard supports. Check max supported speed. | DDR4 RAM won't physically fit in a DDR5 slot (and vice versa). Key notch is different. |
| Will my GPU fit in this case? | Check case spec for "Max GPU Length" (in mm). Compare to your GPU's length spec. Check GPU height (slots) too. | GPU physically hits the case frame. Won't fit. Some cases require removing a drive cage. |
| Will my CPU cooler fit? | Check case spec for "Max CPU Cooler Height" (in mm). Compare to cooler's height. Also check socket compatibility. | Cooler hits the side panel or is too tall to close the case. Usually happens with big tower coolers in small cases. |
| Is my PSU powerful enough? | Use pcpartpicker.com or an online PSU calculator. Sum up CPU TDP + GPU TDP + ~100W for rest of system. Add 20-30% headroom. | PC may crash under load, refuse to boot, or the PSU could fail. Undersized PSUs also run hotter and louder. |
| Does my PSU have the right cables? | Check GPU requires: 8-pin PCIe, 12-pin, or 16-pin. Ensure PSU has enough of the right connectors or use adapters (not ideal). | Can't power the GPU. No adapter? Can't use the card. Cheap adapters can be fire hazards. |
| Will my motherboard fit this case? | Check case supports the motherboard form factor: ATX case supports ATX/mATX/ITX. mATX case supports mATX/ITX. ITX case = ITX only. | Motherboard screw holes won't align with standoffs. Won't fit physically. Bigger board in smaller case = no go. |
| Do I have enough fan headers? | Count your fans. Compare to motherboard fan headers (CHA_FAN, SYS_FAN). Use a fan hub if you need more. | Some fans won't be controllable. You can use Molex adapters from PSU but lose speed control. |
Whether you're stuck on a step, need help picking parts, or want us to build it for you — reach out. We love helping people get into PC building.