What You Need Before You Start

Building a gaming PC means buying individual components and assembling them yourself rather than buying a pre-built machine. You will need a CPU (processor), motherboard, RAM (memory), storage drive, power supply, graphics card, and a case to house everything. You will also need a screwdriver — Phillips head, magnetic tip preferred — and a workspace with room to lay out parts.

The most important step before buying anything is deciding what you want to play and at what resolution and frame rate. A gaming PC for 1080p gaming at 60 frames per second costs less than one built for 4K at 144 frames per second. Your target determines which graphics card you buy, which then determines your power supply size, which then determines your case and cooling needs. Start with your monitor resolution and target frame rate, then work backward to the components.

You do not need special tools or technical experience. The parts are designed to fit together in one way only — you cannot install a CPU backward or plug a RAM stick into the wrong slot. The most common mistake is not reading the motherboard manual, which shows you exactly where each cable goes and in which direction.

Key Takeaways

  • Your graphics card choice drives the entire build, so decide your target resolution and frame rate first, then pick a GPU that can deliver it.
  • CPU and motherboard must match: an Intel CPU needs an Intel-compatible motherboard, and AMD CPUs need AMD-compatible boards.
  • Power supply wattage must exceed your system's total power draw by at least 20 percent, and a 80+ Bronze rating or better ensures efficiency.
  • RAM speed and capacity matter less than compatibility with your motherboard, so check the motherboard manual for supported speeds before buying.
  • The case must fit your motherboard size and your graphics card length, so measure your GPU before ordering a case.

Choosing Your Graphics Card and Power Supply

The graphics card is the most expensive component and the one that determines gaming performance more than any other part. NVIDIA and AMD are the two manufacturers. NVIDIA cards are labeled GeForce RTX (for example, RTX 4060, RTX 4070, RTX 4090), and AMD cards are labeled Radeon RX (for example, RX 7600, RX 7700 XT). Websites like TechPowerUp and Tom's Hardware publish benchmarks showing which cards hit which frame rates at which resolutions — use those to find the card that matches your target.

Once you know your graphics card, look up its power consumption in watts. Add the CPU power consumption (found on the manufacturer's spec sheet) and add 50 watts for the rest of the system. That total is your minimum power supply wattage. Buy a power supply rated for at least 20 percent more than that number. A system drawing 450 watts should have a 550-watt or 650-watt power supply. Look for 80+ Bronze certification or higher, which means the power supply converts wall power to usable power efficiently.

NVIDIA and AMD cards also have different driver software and different performance on different games, so read reviews of the specific card in the games you plan to play. A card that benchmarks well overall might perform worse in your favorite title.

Matching Your CPU and Motherboard

Your CPU and motherboard must be compatible. Intel CPUs use Intel sockets (currently LGA1700 for newer chips), and AMD CPUs use AMD sockets (currently AM5). If you buy an Intel CPU, your motherboard must have an LGA1700 socket. If you buy an AMD CPU, your motherboard must have an AM5 socket. They are not interchangeable.

Motherboards come in three sizes: ATX (full-size), Micro-ATX (medium), and Mini-ITX (small). Larger cases fit all three sizes. Smaller cases may only fit Micro-ATX or Mini-ITX. Check your case specifications before buying a motherboard, because a full-size ATX board will not fit in a Mini-ITX case.

CPU and motherboard prices vary widely. A budget gaming build might use a Ryzen 5 5600X (AMD) or Intel Core i5-13600K, while a high-end build might use a Ryzen 7 7700X or Intel Core i9-13900K. The motherboard price usually ranges from $120 to $300 depending on features. For a first build, a mid-range motherboard with good reviews is safer than the cheapest option, because cheap boards sometimes have poor power delivery or limited upgrade paths.

RAM, Storage, and Cooling

RAM comes in two speeds: DDR4 and DDR5. Your motherboard manual will list which speeds it supports. DDR5 is newer and faster but more expensive. For gaming, 32GB of RAM is standard, though 16GB is still adequate. Buy RAM that matches your motherboard's supported speed — if your board supports DDR5-6000, buying DDR5-7200 RAM will not help because the motherboard will run it at 6000 anyway.

Storage means your hard drive or solid-state drive (SSD). An NVMe SSD (the small stick-shaped drive that plugs directly into the motherboard) is faster than a SATA SSD and costs about the same. Buy at least 1TB for the operating system and games. A 2TB drive gives you room to install 10 to 15 modern games without running out of space.

CPU cooling comes in two types: air coolers (a fan and heatsink) and liquid coolers (a pump, radiator, and fans). Air coolers are cheaper, quieter, and more reliable for most builds. Liquid coolers look better and cool slightly better, but they cost more and require more maintenance. For a mid-range CPU like a Ryzen 5 or Core i5, a good air cooler like the Noctua NH-D15 or be quiet! Dark Rock Pro 4 is sufficient. High-end CPUs like a Ryzen 7 or Core i9 benefit from a 280mm or 360mm liquid cooler.

Choosing a Case and Assembling the Parts

The case holds everything and affects airflow, noise, and how easy the build is. Measure your graphics card length (found in the GPU spec sheet) and check the case's maximum GPU length. Measure your CPU cooler height and check the case's maximum cooler height. A case that is too small will not fit your parts. Popular cases for first builds include the NZXT H510 Flow, Corsair 4000D Airflow, and Fractal Design Core 1000, all of which fit standard components and cost $50 to $100.

Assembly takes 1 to 3 hours depending on experience. Start by installing the power supply in the case (fan facing down if the case has ventilation, up if it does not). Install the I/O shield (the metal plate that came with the motherboard) into the rear of the case. Install the motherboard standoffs (small brass posts) in the case where the motherboard mounting holes line up. Place the motherboard in the case and screw it down — do not overtighten.

Install the CPU into the motherboard socket (the socket has a lever that opens and closes; open it, place the CPU with the notch aligned, and close the lever). Install the RAM by opening the clips on each end of the RAM slot, aligning the notch on the RAM stick with the key in the slot, and pressing down until the clips snap closed. Install the NVMe SSD by removing the small screw on the M.2 slot, inserting the drive at a 30-degree angle, and pressing down to screw it in place. Install the CPU cooler according to its manual — different coolers mount differently.

Connecting Power and Testing

Connect the 24-pin motherboard power cable from the power supply to the motherboard. Connect the 8-pin CPU power cable (or 4-pin on some boards) from the power supply to the top of the motherboard near the CPU. Connect the SATA power cable from the power supply to any SATA drives (not needed for NVMe). Connect the PCIe power cables (usually 6-pin or 8-pin) from the power supply to the graphics card.

Install the graphics card by removing the slot covers from the rear of the case, opening the clip at the end of the PCIe slot on the motherboard, aligning the card with the slot, and pressing down until the clip snaps closed. The card should sit flush in the slot. Screw the card's bracket to the case.

Before closing the case, flip the power supply switch to ON and press the power button on the motherboard (or the case power button if you have connected it). The fans should spin and the motherboard should light up. If nothing happens, turn off the power supply and check that all cables are fully seated. Once it powers on, turn it off, close the case, connect your monitor to the graphics card (not the motherboard), and boot into the BIOS to verify all components are detected.

Installing Windows and Drivers

Download Windows 11 from Microsoft's website onto a USB drive using another computer. Plug the USB drive into your new PC, boot from it (usually by pressing Delete or F2 during startup to enter the BIOS, then selecting the USB drive as the boot device), and follow the Windows installer. Windows will ask for a product key; you can enter one now or skip and enter it later.

Once Windows is installed, download the motherboard chipset drivers from the motherboard manufacturer's website and install them. Then download the graphics card drivers: NVIDIA drivers from nvidia.com or AMD drivers from amd.com. Restart the PC after installing drivers. Open Device Manager (right-click the Start button and select Device Manager) and verify that all devices show green checkmarks with no yellow exclamation marks.

Install Steam, Epic Games, or whichever game platform you use, then download a game and test it. Monitor temperatures using a tool like HWiNFO or GPU-Z to make sure the CPU and GPU stay below 85 degrees Celsius under load. If temperatures are higher, check that the CPU cooler is mounted correctly and that case fans are spinning.

Frequently Asked Questions

Do I need to apply thermal paste to the CPU before installing the cooler?

Most modern CPU coolers come with thermal paste pre-applied to the bottom of the heatsink. If yours does not, apply a small pea-sized amount to the center of the CPU before mounting the cooler. Too much paste reduces cooling performance; too little causes overheating. The cooler's manual will specify the correct amount.

What if my PC powers on but nothing appears on the monitor?

First, make sure the monitor is plugged into the graphics card, not the motherboard. If it is, reseat the RAM by removing it and pressing it back in firmly. Reseat the graphics card the same way. If the PC still does not display anything, the motherboard might not be detecting the GPU — check that the PCIe power cables are fully connected to the card.

Can I upgrade parts later if I want better performance?

Yes. You can upgrade the graphics card, CPU, RAM, and storage without replacing the entire PC. The motherboard and power supply may need upgrading if you choose very high-end components, but most mid-range upgrades work with the original parts. Keep your motherboard manual so you know which RAM speeds and CPU sockets it supports.

How much does it cost to build a gaming PC?

A gaming PC for 1080p at 60 frames per second costs $700 to $1000. A PC for 1440p at 100+ frames per second costs $1200 to $1800. A PC for 4K at high frame rates costs $2000 and up. These ranges include the monitor, keyboard, and mouse. The graphics card usually accounts for 30 to 40 percent of the total cost.

Do I need to update the BIOS before building?

Not usually. Most motherboards ship with a BIOS version that supports current CPUs. If you buy a very new CPU and an older motherboard, the BIOS might need an update — the motherboard manual will list which BIOS version supports which CPUs. If an update is needed, you can update it from within the BIOS menu using a USB drive.