What Does Each PC Part Do?

🧩 1. CPU (Central Processing Unit) – The Brain

What it does:

The CPU handles instructions and calculations. It runs your operating system, opens apps, and processes data in games and programs.

Why it matters:

A faster CPU means better multitasking, smoother gameplay, and quicker load times — especially in CPU-heavy games like strategy or simulation titles.

What to look for:

• Brands: Intel (Core i5, i7), AMD (Ryzen 5, Ryzen 7)

• Clock speed (GHz) and core count (e.g. 6-core, 8-core)

🎮 2. GPU (Graphics Processing Unit) – The Visual Muscle

What it does:

The GPU handles everything you see on-screen. It's responsible for rendering graphics, textures, and effects in games and videos.

Why it matters:

If you want high FPS (frames per second) in games like Fortnite or Call of Duty, a strong GPU is essential.

What to look for:

• Brands: NVIDIA (GTX, RTX), AMD (Radeon RX)

• VRAM (e.g. 6GB, 8GB), model number (higher = better generally)

⚡ 3. RAM (Memory) – The Short-Term Storage

What it does:

RAM temporarily stores data your system needs right now — like game files, browser tabs, and background apps.

Why it matters:

More RAM = smoother multitasking and gaming. Without enough RAM, your PC will slow down even with a strong CPU/GPU.

What to look for:

• 16GB is ideal for gaming

• DDR4 or DDR5 is the latest standard

💾 4. Storage – Where Your Data Lives

There are two types:

a) SSD (Solid State Drive) Faster and more reliable. Loads games, apps, and Windows quickly.

b) HDD (Hard Disk Drive) Slower but cheaper. Good for storing large files like videos.

What to look for:

• At least 500GB SSD for your main drive

• Add a 1TB HDD if you need extra storage

🔌 5. Motherboard – The Connector

What it does:

Think of it like the hub — it connects your CPU, GPU, RAM, and storage together.

Why it matters:

It controls compatibility, upgrade potential, and features like Wi-Fi or RGB.

What to look for:

• Match the socket with your CPU (e.g. AM4 for AMD)

• Choose based on size (ATX, mATX, ITX)

🔋 6. PSU (Power Supply Unit) – The Power Source

What it does:

Delivers electricity to your components safely.

Why it matters:

A weak PSU can damage parts or cause crashes.

What to look for:

• 80+ Bronze or better (efficiency rating)

• Enough wattage (e.g. 600W for most gaming PCs)

🌬️ 7. Cooling – Keep It Cool

What it does:

Keeps your CPU and GPU from overheating with fans or liquid coolers.

Why it matters:

Good cooling = better performance and longer lifespan.

Types:

• Air coolers (simple, affordable)

• AIO liquid coolers (quieter, more effective)

🖥️ 8. Case – The Frame

What it does:

Holds everything together and manages airflow.

Why it matters:

A well-ventilated case prevents overheating and improves aesthetics.

Look for:

• Good airflow (mesh front panels)

• Room for GPU and cable management

⌨️ 9. Peripherals – The Add-Ons

• Monitor – Shows your visuals (refresh rate matters for gaming)

• Keyboard & Mouse – Choose wired for responsiveness

• Headset – For clear sound and communication

🧠 Final Thoughts

Understanding your PC parts helps you make better buying decisions — whether you’re browsing listings on PCIFIC or planning your first custom build. You don’t need to be an expert, just focus on what matters most for your games and use case.

🔍 Want to Buy or Sell PC Parts Online?

At PCIFIC, we make it easy and safe to buy or sell quality PC components in the UK. No clutter, no random listings — just tech.

👉 Explore PC Parts on PCIFIC