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Parts You Need to Build a Gaming PC
A gaming PC has seven core components. Every build needs all seven, and each one affects gaming performance differently. Here’s what each part does and how much to budget for it.
| Component | What It Does | Budget | Mid-Range | High-End |
|---|---|---|---|---|
| CPU | Processes game logic, AI, physics | $120 to $180 | $250 to $350 | $400 to $600 |
| GPU (Graphics Card) | Renders every frame you see | $200 to $300 | $400 to $600 | $700 to $1,200 |
| Motherboard | Connects everything together | $80 to $130 | $150 to $250 | $300 to $500 |
| RAM | Temporary fast storage for active data | $50 to $70 | $70 to $120 | $120 to $200 |
| Storage (SSD) | Stores games, OS, files | $40 to $60 | $80 to $130 | $150 to $250 |
| Power Supply (PSU) | Powers everything | $50 to $80 | $80 to $130 | $150 to $250 |
| Case | Houses everything, manages airflow | $50 to $80 | $80 to $150 | $150 to $300 |
Total budget range: a solid 1080p gaming PC runs $600 to $900. A 1440p mid-range build costs $1,100 to $1,600. A 4K high-end system hits $2,000 to $3,000. The GPU takes the biggest share of the budget in every tier because it determines frame rates more than any other component.
How to Pick Compatible Parts
The most common first-timer mistake is buying parts that don’t work together. Two compatibility rules matter most: the CPU must match the motherboard socket, and the power supply must provide enough wattage for the GPU. Get these right and everything else is straightforward.
Intel CPUs use LGA sockets (LGA 1700 for 13th/14th gen, LGA 1851 for Arrow Lake). AMD CPUs use AM5 (Ryzen 7000 and 9000 series) or the older AM4 (Ryzen 5000 and below). The motherboard’s socket type is always listed in its specs – match it to your CPU and you’re good.
We also cover wireless gaming headset in a separate article worth checking out.
Use PCPartPicker (pcpartpicker.com) to plan your build. It automatically checks compatibility between every component and flags conflicts. It also compares prices across retailers to find the best deals. Start your build list there before buying anything.
Step-by-Step Assembly
Before you start, work on a clean, flat, non-carpeted surface. Static electricity can damage components, but the risk is lower than people think – just touch the metal case or power supply occasionally to discharge any static buildup. Don’t build on carpet in socks.
Step 1: Install the CPU
- Open the motherboard’s CPU socket by lifting the retention arm.
- Align the CPU with the socket. Look for the golden triangle on the CPU corner – it matches an indicator on the socket.
- Place the CPU straight down into the socket. It drops in with zero force. If you have to push, the alignment is wrong.
- Lower the retention arm to lock the CPU in place.
Step 2: Install RAM
- Open the clips on the RAM slots. Use slots 2 and 4 (counting from the CPU) for two sticks – this enables dual-channel mode for better performance.
- Align the notch on the RAM stick with the notch in the slot.
- Press down firmly until both clips snap closed. It takes more force than you’d expect – a solid click on both ends means it’s seated.
Step 3: Install the SSD
- Locate the M.2 slot on the motherboard (usually between the CPU and the first PCIe slot).
- Remove the M.2 heatsink screw and the heatsink if your motherboard has one.
- Insert the M.2 SSD at a 30-degree angle into the slot, then press the other end down flat.
- Secure it with the screw. Replace the heatsink if applicable.
Step 4: Install the CPU Cooler
- If using the stock cooler that came with your CPU, it has pre-applied thermal paste. Skip to mounting. If using an aftermarket cooler, apply a pea-sized dot of thermal paste to the center of the CPU.
- Mount the cooler according to its instructions. Each cooler brand has different mounting hardware. Air coolers typically screw into a backplate behind the motherboard. AIO liquid coolers mount the pump block to the CPU and the radiator to the case.
- Connect the cooler’s fan cable to the CPU_FAN header on the motherboard.
Step 5: Install the Motherboard in the Case
- Install the motherboard’s I/O shield into the rectangular cutout on the back of the case (if not pre-installed on the motherboard).
- Align the motherboard with the standoffs pre-installed in the case. The screw holes on the motherboard should line up with the standoffs.
- Secure the motherboard with the included screws. Don’t overtighten – snug is enough.
Step 6: Install the Power Supply
- Slide the PSU into the bottom compartment of the case with the fan facing down (if the case has a bottom vent) or up.
- Secure it with the four screws on the back panel.
- Route the cables: connect the 24-pin ATX cable to the motherboard, the 8-pin CPU power cable to the top of the motherboard, and keep GPU power cables ready.
Step 7: Install the GPU
- Remove the necessary expansion slot covers from the back of the case (usually two slots).
- Open the retention clip on the top PCIe x16 slot (the one closest to the CPU).
- Align the GPU with the slot and press down firmly until the retention clip clicks.
- Secure the GPU to the case with screws through the bracket.
- Connect the PCIe power cables from the PSU to the GPU. Modern GPUs need one to three 8-pin connectors depending on the model.
Step 8: Connect Cables and Power On
- Connect the case’s front panel cables (power button, reset button, USB, audio) to the motherboard headers. Check your motherboard manual for the exact pin layout.
- Connect case fans to the SYS_FAN headers.
- Double-check all connections: 24-pin ATX, 8-pin CPU, GPU power, RAM seated, SSD secured.
- Plug in the power cable, flip the PSU switch on, and press the case power button.
- If everything lights up and you see the BIOS screen on your monitor, the build is successful.
After Your First Boot
Once the PC posts (shows the BIOS screen), you need to install an operating system. Create a Windows 11 installation USB drive using Microsoft’s Media Creation Tool on another computer. Boot from the USB drive, follow the installation prompts, and install Windows on your SSD.
After Windows is installed, download and install your GPU drivers from nvidia.com or amd.com. Enable XMP/EXPO in the BIOS to run your RAM at its rated speed (it defaults to a slower speed without this). Update the motherboard BIOS to the latest version from the manufacturer’s website. Then install Steam, download your games, and enjoy the machine you built.
If you are still exploring options, our WiFi router for gaming guide is a solid next read.
Is building a PC cheaper than buying prebuilt?
Usually, yes – by 10 to 20%. You also get better component quality because prebuilt manufacturers often cut costs on the power supply, motherboard, and case. The bigger advantage is knowing exactly what’s in your system and being able to upgrade individual parts later. A prebuilt makes sense if you value your time over savings and don’t want the assembly process.
What if my PC doesn’t turn on after building?
Don’t panic. The most common causes are: the power supply switch on the back is off, the 24-pin or 8-pin CPU cables aren’t fully seated, the RAM isn’t clicked in completely, or the front panel power button cable is on the wrong pins. Reseat every connection, double-check the front panel header pinout in your motherboard manual, and try again. If it still doesn’t post, try booting with one RAM stick to rule out a bad memory module.
Do I need a CPU cooler or does one come included?
AMD Ryzen 5 and Ryzen 7 CPUs include a stock cooler that’s adequate for normal use. Intel’s stock coolers are included with non-K processors and work fine for budget builds. High-end CPUs (Ryzen 9, Intel K-series) run hot enough that an aftermarket cooler ($30 to $100 for air, $80 to $200 for liquid) is strongly recommended. Even on mid-range CPUs, a $30 aftermarket air cooler runs quieter and cooler than the stock option.
Sources
PCPartPicker – PC Part Picker | Microsoft – Windows 11 Download
