Hardware: CPU, RAM and storage.
When you buy a laptop or phone, the shopkeeper talks about "i5, 8 GB RAM, 512 GB SSD". Today you'll understand exactly what those mean, so you can choose wisely and understand why a device is slow.
The main parts
| Part | Simple meaning | What to look for |
|---|---|---|
| CPU (processor) | The brain that does the work | Intel Core i3/i5/i7, AMD Ryzen 3/5/7, phone chips like Snapdragon, Dimensity, Apple A-series |
| RAM (memory) | Short-term working space | 8 GB minimum for laptops today; 16 GB for heavy work |
| Storage | Long-term space for files and apps | SSD (fast) is much better than HDD (old, slow); 256–512 GB common |
| GPU (graphics) | Handles images, video and games | Built-in is fine for office work; separate GPU for gaming, editing, AI |
| Screen | Display | Size, resolution (Full HD = 1920×1080), brightness |
| Battery | Power away from the plug | Measured in hours of use or mAh (phones) |
Read a real spec
Laptop: Intel Core i5 (13th gen) · 16 GB RAM · 512 GB SSD · 15.6" Full HD · Windows 11- i5, 13th gen: a mid-range, fairly recent processor. Generation matters as much as the "i" number.
- 16 GB RAM: comfortable for many browser tabs, Office and light editing.
- 512 GB SSD: fast startup and enough space for most students.
Why is my device slow?
Buying advice for students (general)
- For college and office work: a recent i3/i5 or Ryzen 3/5, 8–16 GB RAM, SSD of 256–512 GB.
- For video editing or coding heavy projects: i5/Ryzen 5 or above, 16 GB RAM, good cooling.
- Check warranty, service centres in Hyderabad, and battery reviews.
Your laptop takes 4 minutes to start and has an old 1 TB HDD. Which upgrade likely helps most?
SSDs are many times faster than old HDDs for startup and opening apps.
"8 GB RAM, 256 GB" on a phone. What is the 256 GB?
256 GB is storage for apps, photos and files.
Your task (10 min)
Find your laptop's or phone's specs (Windows: Settings → System → About; Android: Settings → About phone). Write down CPU, RAM and storage, and check how full your storage is. Delete or back up anything you don't need if it's over 85% full.
Lesson 2 complete!
You understand CPU, RAM, storage, GPU and how to read a laptop or phone specification. Next: software and operating systems.
Next: Software and operating systems →