The Core Components You Cannot Skip
A working gaming PC needs exactly seven things: a CPU (processor), a GPU (graphics card), a motherboard, RAM (memory), storage (SSD or hard drive), a power supply, and a case to hold it all. Every other part—fans, cables, RGB lighting—is either included with these or optional. If any one of these seven is missing, your PC will not turn on.
The CPU and GPU are where most of your budget goes, because they determine what games run and how fast. A CPU handles game logic and physics. A GPU renders the graphics you see on screen. You cannot cheap out on either one if you want smooth gameplay at the settings you want.
The motherboard is the circuit board that lets all seven parts talk to each other. It has slots for the CPU, RAM, and storage, plus connectors for the power supply and case fans. The case is just a box, but it needs to be big enough for your motherboard size and your GPU length—this trips up more first-time builders than anything else.
Key Takeaways
- You need a CPU, GPU, motherboard, RAM, storage drive, power supply, and case—nothing else is required to turn the PC on and play games.
- The GPU and CPU together account for 50 to 70 percent of your total budget, because they directly control gaming performance.
- Your case must physically fit your motherboard size and your GPU length, or assembly stops before it starts.
- A power supply must have enough wattage for your CPU and GPU combined, plus 20 to 30 percent headroom, or the system will shut down under load.
- RAM and storage are easier to upgrade later than CPU or GPU, so you can start smaller and add more without rebuilding.
CPU and GPU: Where Your Money Goes
The CPU and GPU are the two parts that determine whether a game runs at all, and how many frames per second you get. Frame rate is what you feel when you play—60 frames per second feels smooth, 30 feels sluggish, 144 feels responsive. Your GPU does most of the work for frame rate in games, but your CPU has to keep up or it becomes the bottleneck.
For a budget gaming build (1080p resolution, 60 frames per second), a mid-range GPU like an RTX 4060 or RX 7600 costs $200 to $250, and a mid-range CPU like a Ryzen 5 5600X or Intel i5-13600K costs $150 to $250. For higher resolution or frame rate (1440p at 100+ frames per second), you are looking at $400 to $600 for the GPU alone.
The CPU and GPU must match each other's tier roughly. A high-end GPU paired with a budget CPU will sit idle waiting for the CPU to feed it data. A high-end CPU paired with a budget GPU will not help your frame rate. Check reviews of the specific pair you are considering—sites like TechPowerUp and GamersNexus test real games and show you the frame rates you will actually get.
Motherboard, RAM, and Storage Choices
The motherboard connects everything, so it must have the right socket for your CPU. AMD CPUs use AM5 or AM4 sockets depending on the generation. Intel CPUs use LGA1700 or older sockets. If you buy a Ryzen 5 5600X (AM4 socket), you must buy an AM4 motherboard—an AM5 board will not work. Check the CPU box or the manufacturer's website to confirm the socket before you buy.
RAM is how much working memory your PC has while running. 16 gigabytes is the standard for gaming in 2024. 32 gigabytes is overkill for gaming alone but useful if you also stream or edit video. 8 gigabytes will run most games but may cause stuttering in newer titles. RAM is one of the easiest parts to upgrade later—you can add more sticks without touching anything else—so starting with 16 GB and upgrading to 32 GB in a year is a reasonable plan.
Storage means your SSD or hard drive. An SSD (solid state drive) is much faster than an old hard drive and is now the standard. A 500 GB SSD is too small for more than a few games. A 1 TB SSD is the practical minimum. A 2 TB SSD gives you room to install 10 to 15 modern games without constantly deleting old ones. SSDs have dropped in price—a 1 TB SSD costs $50 to $80, so there is no reason to buy a hard drive for a new build.
Power Supply Sizing and Case Fit
The power supply must have enough wattage to run your CPU and GPU at full load, plus 20 to 30 percent extra as headroom. A system with a Ryzen 5 5600X and RTX 4060 draws about 250 watts under load, so a 650-watt power supply is safe. A system with a Ryzen 7 7700X and RTX 4080 draws about 500 watts, so a 750-watt supply is the minimum.
Do not guess your wattage. Use the TDP (thermal design power) numbers from the CPU and GPU spec sheets, add them together, and multiply by 1.3. A 105-watt CPU plus a 130-watt GPU equals 235 watts, times 1.3 equals 305 watts minimum. Round up to the next standard size (650 watts in this case) and you are safe. Undersizing the power supply is one of the few ways to actually damage your PC—it will shut down mid-game or fail to start.
The case must fit your motherboard size and your GPU length. Motherboards come in ATX (full size, about 12 by 10 inches), Micro-ATX (smaller, about 9 by 9 inches), and Mini-ITX (tiny, about 6.7 by 6.7 inches). Your case spec sheet will say which sizes it supports. Your GPU length is listed in the product specs—a long card like the RTX 4080 can be 12 inches or more. Check your case's maximum GPU length before you buy. A GPU that does not fit is a $400 mistake.
Optional Parts That Make a Difference
Case fans, CPU coolers, and cable extensions are not required to build a PC, but they affect how well it runs and how straightforward it is to build. Most CPUs come with a basic cooler in the box, and it works fine for gaming. If you want lower temperatures or quieter operation, an aftermarket cooler like a Noctua NH-D15 or an AIO (all-in-one liquid cooler) costs $40 to $150 and is worth it if you plan to keep the PC for years.
Case fans improve airflow and keep temperatures down. Most cases come with one or two fans. Adding two more fans (intake in front, exhaust in back) costs $30 to $60 and noticeably lowers GPU and CPU temperatures, which means longer lifespan and quieter operation under load. This is one of the cheapest upgrades you can make after the initial build.
Cable extensions and sleeved cables are purely cosmetic—they make the inside of your case look cleaner but do not affect performance. Skip them on your first build. Modular power supplies (where cables plug in rather than being permanently attached) cost $20 to $40 more but make cable management much easier and are worth the money if you care about the look inside your case.
Tools and Supplies for Assembly
You need a Phillips head screwdriver (the cross-shaped one), an anti-static wrist strap, and a clean, flat surface to work on. The wrist strap costs $5 to $10 and prevents static electricity from frying your parts—it is cheap insurance. A non-carpeted surface like a wooden table or tile floor is ideal. If you must work on carpet, touch the metal case frame every few minutes to discharge static.
Thermal paste comes pre-applied on most coolers, so you do not need to buy it separately. If your cooler does not have it, a small tube costs $5 to $15. You do not need any other supplies—no special cleaning products, no extra cables beyond what comes in the boxes, no thermal pads unless your specific cooler calls for them.
Watch a build video for your specific motherboard and case before you start. Channels like Linus Tech Tips, JayzTwoCents, and Bitwit have step-by-step builds that show you exactly where each part goes and how tight to screw things down. Watching for 20 minutes before you touch anything saves hours of confusion during the actual build.
Budget Breakdown by Performance Level
| Performance Level | CPU | GPU | RAM | Storage | Power Supply | Estimated Total |
|---|---|---|---|---|---|---|
| Budget (1080p, 60 fps) | $150–200 | $200–250 | $40–60 | $50–80 | $50–70 | $600–750 |
| Mid-range (1440p, 100+ fps) | $250–350 | $400–550 | $60–100 | $80–120 | $80–120 | $1,000–1,300 |
| High-end (4K, 60+ fps) | $400–550 | $700–1,000 | $100–150 | $120–200 | $150–200 | $1,700–2,300 |
These are approximate ranges based on current market prices. Actual costs vary by region, sales, and specific models. The GPU is always the largest expense, followed by the CPU. Everything else combined is usually 20 to 30 percent of the total budget.
Frequently Asked Questions
Do I need to buy Windows or an operating system?
Windows 11 is the standard gaming OS. You can install it free and use it with a watermark for as long as you want, or buy a license key for $100 to $150 to remove the watermark and unlock a few features. Most gamers buy the license eventually, but it is not required to build and play games.
Can I reuse parts from an old PC?
You can reuse the case, power supply, and storage drive if they are in good condition. You cannot reuse the CPU or motherboard together—they are locked to each other by socket type. If you are upgrading from an old PC, you are usually replacing the CPU, motherboard, GPU, and RAM as a set, and keeping the case and storage.
What if I want to upgrade later?
RAM and storage are the easiest to upgrade—just add more sticks or a second drive. A GPU upgrade requires only unplugging the old one and plugging in the new one. A CPU upgrade requires removing the cooler, unbolting the old CPU, and installing the new one, which takes 15 minutes. Upgrading the motherboard means rebuilding the whole PC. Plan your motherboard choice carefully because it is the hardest part to change.
Should I buy a prebuilt PC instead of building?
A prebuilt PC costs 15 to 30 percent more than the same parts bought separately, because the manufacturer marks up labor and profit. Building takes 2 to 4 hours the first time and teaches you how your PC works, which helps when something needs fixing. If you are uncomfortable with hardware or do not have time, a prebuilt is reasonable. If you want the best value, building is worth learning.
What is the difference between AMD and Intel?
Both make CPUs that work fine for gaming. AMD Ryzen chips are usually cheaper for the same performance. Intel chips sometimes edge ahead in frame rate in specific games. For a first build, pick whichever CPU and motherboard combo is cheaper for your budget—the difference in gaming is small enough that price matters more.