Essential PC Parts & What They Do

Before building, it's important to understand each part of your PC. All of them are necessary for a functioning computer, so don't start your build without any of them.

Designing Your PC

When designing a PC, there are a lot of directions you can go depending on the aesthetic, functionality, and purpose of the machine. Here you can find a few design ideas on Pinterest.

1. Processor (CPU)

The CPU (Central Processing Unit) is the brain of your computer. It performs all the calculations and instructions needed to run your operating system, software, and applications.

Intel vs AMD, the picture shows two cpus, with flames between them

What to buy

1. Purpose of Your PC

2. CPU Socket Type & Motherboard Compatibility

Ensure the CPU socket matches your motherboard's socket type. Intel and AMD use different socket designs (e.g., Intel uses LGA 1200, and AMD uses AM4). Double-check the compatibility before buying.

3. Core Count and Threads

4. Clock Speed (GHz)

The clock speed determines how fast your CPU can execute instructions. A higher clock speed results in better performance, particularly in tasks like gaming.

5. Integrated Graphics vs. No Integrated Graphics

Some CPUs have integrated graphics, while others do not. If you’re not using a dedicated GPU, make sure to buy a CPU with integrated graphics, such as Intel’s iGPU models or AMD’s Ryzen G series.

6. Overclocking Potential

Overclocking is the process of pushing a CPU to perform faster than its default settings. If you want to overclock, look for unlocked CPUs like Intel's “K” series or AMD’s Ryzen “X” series.

7. Brand Preference: Intel vs. AMD

8. Budget Considerations

While premium CPUs like Intel’s i9 or AMD’s Ryzen 9 offer top-tier performance, they are usually overkill for most casual gamers or general users. Determine your budget and needs before splurging on high-end chips. A mid-range CPU, such as the Intel Core i5 or AMD Ryzen 5, will likely offer the best value for most users.

Graphics Processing Unit (GPU)

A GPU (Graphics Processing Unit) is responsible for rendering images, videos, and animations on your screen. It plays a crucial role in gaming, video editing, 3D rendering, and AI-based workloads.

Picture of an Nvidia rtx 5090

What to buy

1. Purpose of Your PC

2. GPU Compatibility (PCIe & PSU Requirements)

3. VRAM (Video Memory)

4. Ray Tracing & DLSS/FSR

5. Cooling & Thermal Design

6. Overclocking Potential

Like CPUs, GPUs can be overclocked to boost performance. Many manufacturers provide software tools (e.g., MSI Afterburner, EVGA Precision X1) to adjust clock speeds, power limits, and fan curves.

Overclocking increases power draw and heat, so ensure adequate cooling.

7. Brand Preference: NVIDIA vs. AMD

8. Budget Considerations

Choosing the right GPU depends on your needs, resolution, and budget. Always check benchmarks and real-world performance before making a final decision!

3. Motherboard

A motherboard is the backbone of your computer, connecting all components and allowing them to communicate with each other. Choosing the right motherboard is essential for compatibility and performance.

Picture of a modern motherboard

What to buy

1. Purpose of Your PC

2. CPU Socket Type & Chipset Compatibility

3. Form Factor (Size)

4. RAM Compatibility and Slots

5. PCIe Slots and Expansion

6. Storage Options (SATA & M.2 Slots)

7. Connectivity & Ports

8. Overclocking Support (Advanced)

9. Brand Preference & Budget

4. Power Supply Unit (PSU)

The Power Supply Unit (PSU) is a crucial component that provides stable and reliable power to your entire system. Choosing the right PSU ensures system stability, efficiency, and longevity.

Picture of Corsair PSU box

What to buy

PRO TIP: This is a component that doesn’t necessarily bring any performance upgrades, so people tend to cheap out on PSUs. However, I DO NOT recommend doing so. You can avoid these problems:

1. Purpose of Your PC

2. Wattage Requirements

3. Efficiency Rating (80 PLUS Certification)

4. Modularity (Cable Management)

5. Connectors & Compatibility

6. Overclocking and Power Stability (Advanced)

7. Brand Preference & Reliability

8. Budget Considerations

5. Storage (SSD/HDD)

Storage is where your operating system, games, applications, and files are stored. Choosing the right type and amount of storage is essential for performance and reliability.

Picture of a bunch of ssd storages

What to buy

1. Purpose of Your PC

2. Types of Storage

3. NVMe vs. SATA SSDs

4. HDD Considerations

5. Storage (SSD/HDD)

Storage is where your operating system, games, applications, and files are stored. Choosing the right type and amount of storage is essential for performance and reliability.

6. Storage Capacity Recommendations

7. Hybrid Storage Setup (Best of Both Worlds)

8. Durability & Longevity

9. Brand Preference & Budget

6. Memory (RAM)

RAM (Random Access Memory) is a critical component that temporarily stores data for quick access by the CPU. The amount and speed of RAM impact system performance, multitasking, and application responsiveness.

Picture of two ram sticks

What to buy

1. Purpose of Your PC

2. DDR Generation (DDR4 vs. DDR5)

3. RAM Capacity Recommendations

4. RAM Speed (MHz) and Latency (CAS Latency)

5. Single vs. Dual vs. Quad Channel Memory

6. RGB and Aesthetics

7. Compatibility & Overclocking

8. Brand Preference & Budget

7. Cooling System

Cooling is essential for maintaining stable performance and longevity of your components. Overheating can lead to thermal throttling, reducing CPU and GPU efficiency, and in extreme cases, permanent damage.

Picture of a liquid and an aircooler next to eachother

What to buy

1. Purpose of Your PC

2. Types of Cooling

3. Cooling for CPU vs. GPU

4. Case Fans & Airflow

5. Thermal Paste & Its Importance

6. Noise Considerations

7. Compatibility & Budget

8. Case

The PC case (or chassis) houses all your components and plays a crucial role in cooling, airflow, aesthetics, and overall build experience. Choosing the right case ensures compatibility, good thermal performance, and an easy building process.

Picture of an aesthetic wooden PC case

What to buy

1. Purpose of Your PC

2. Case Sizes & Form Factors

3. Airflow & Cooling Support

4. GPU & CPU Cooler Clearance

5. Cable Management Features

6. Drive Bays & Storage Support

7. Aesthetics & Build Quality

8. Front I/O Ports & Connectivity

9. Brand Preference & Budget

Price

The price range of a PC can vary greatly depending on its performance tier and intended use. Entry-level PCs typically cost between $400 and $700, offering basic functionality for tasks like office work and light gaming. High-end systems, designed for demanding activities like 4K gaming or video editing, can range from $1,500 to over $3,000, delivering top-tier performance and advanced features.

Price Range Information
Performance Tier Expected Price Range (USD) Description
Entry-Level $400 - $700 Basic tasks, light gaming (1080p low settings), office work
Mid-Range $800 - $1,200 1080p/1440p gaming, moderate productivity, streaming
High-End $1,500 - $2,500 1440p/4K gaming, high-performance workloads (video editing, 3D rendering)
Enthusiast/Extreme $3,000+ Top-tier gaming (4K/8K), AI workloads, heavy content creation