A computer that is perfect for typing a CV may struggle to edit a carnival video or run the latest football game. In this post you will learn to look at a computer’s specifications and decide whether it is suitable for a specific purpose.
Build on what you learned in Forms 1–3
These Lower School ICT posts cover the basics of this topic:
- Hardware Specifications – Computer Ports – reading what a computer can connect to
- Screen size and resolution – what makes one display better than another
- Categories of Software – the software a computer needs to do a job
In this post:
- The five criteria: processing speed, memory, secondary storage, software and input/output devices
- What different jobs need (web browsing, video games, graphic design, video editing, desktop publishing)
- How to read a computer advertisement
- Justifying your choice in the exam
The five criteria
| Criterion | What to look at | Why it matters |
|---|---|---|
| Processing speed | CPU type (e.g. Intel Core i3/i5/i7, AMD Ryzen 3/5/7, Apple M-series), number of cores, clock speed in GHz | A faster CPU with more cores finishes heavy tasks (video, games) sooner |
| Memory (RAM) | Amount in GB (e.g. 4 GB, 8 GB, 16 GB, 32 GB) | More RAM lets you open large files and many programs at once without slowing down |
| Secondary storage | Capacity (e.g. 256 GB, 1 TB) and type/speed (SSD is much faster than HDD) | Videos, photos and games take up a lot of space; an SSD makes the computer start and load quickly |
| Types of software | Operating system and the application software needed (e.g. a video editor, a DTP package) | The computer must be able to run the software the job needs |
| Input/output devices | Screen size and resolution, graphics card, keyboard, mouse or stylus, printer, webcam, speakers | Some jobs need special devices, e.g. a graphics tablet for design or a colour printer for flyers |
Video: Understanding Computer Specs | What Computer Specs You Need in a Computer – https://www.youtube.com/watch?v=eqrJmstbzu4
Image source: File:RAM Module (SDRAM-DDR4).jpg
What different jobs need
| Purpose | Typical needs |
|---|---|
| Web browsing, email, word processing | Basic CPU (e.g. Core i3/Ryzen 3), 4–8 GB RAM, 128–256 GB storage; a web browser and office suite |
| Desktop publishing (flyers, newsletters) | Mid-range CPU, 8 GB RAM, a good-quality screen, DTP software (e.g. Publisher), a colour printer |
| Graphic design | Fast CPU, 16 GB RAM, SSD, large high-resolution colour-accurate monitor, a graphics card, design software, a graphics tablet/stylus |
| Video editing | Fast multi-core CPU (Core i7/Ryzen 7), 16–32 GB RAM, large fast SSD (1 TB+), dedicated graphics card, video-editing software, good speakers/headphones |
| Playing modern video games | Fast CPU, 16 GB RAM, dedicated graphics card, SSD with lots of space, high-refresh monitor, gamepad or gaming keyboard/mouse |
Notice that you only need to match the system to the job. Buying a very expensive gaming computer just to browse the web and type letters is not a sensible choice – it wastes money.
Reading a computer advertisement
Here is the kind of advertisement you might see in a newspaper or on a store’s website:
“Laptop – Intel Core i5 2.4 GHz, 8 GB RAM, 512 GB SSD, 15.6-inch Full HD display, Windows 11, webcam, Wi-Fi, 2 × USB, HDMI.”
- Core i5 2.4 GHz – a mid-range processor and its clock speed.
- 8 GB RAM – enough for school work, browsing and light photo editing.
- 512 GB SSD – fast storage with a reasonable amount of space.
- 15.6-inch Full HD – screen size and resolution (1920 × 1080).
- Windows 11 – the operating system that comes with it.
- Webcam, Wi-Fi, USB, HDMI – built-in devices and ports.
Verdict: suitable for a CSEC student, an office worker or a small business. It would struggle with professional video editing (more RAM and a dedicated graphics card would be better).
See the original notes in Computer Suitability by Specification.
Try it: Which computer for which job?
Three computers are on sale:
• A – Core i3, 4 GB RAM, 128 GB SSD, no graphics card
• B – Core i5, 8 GB RAM, 512 GB SSD, colour printer included
• C – Core i7, 32 GB RAM, 2 TB SSD, dedicated graphics card
Choose the most suitable (and sensible) computer for each user.
| A grandmother who only checks email and video-calls family abroad | |
| A church secretary who designs and prints the weekly bulletin | |
| A videographer editing a 4K wedding video | |
| A student who wants to play the newest 3D games | |
| A Form 4 student typing assignments and doing research online |
Paper 1 practice (multiple choice)
Choose the best answer for each question. Try them all before you check.
1. Which component has the GREATEST effect on how many programs can be open at once without the computer slowing down?
(A) Monitor size
(B) RAM
(C) Keyboard
(D) Webcam
2. “1 TB SSD” in a computer advertisement describes
(A) the processor
(B) the secondary storage
(C) the screen
(D) the operating system
3. Which user would MOST need a dedicated graphics card?
(A) A typist
(B) A video game player
(C) Someone who only sends email
(D) A cashier
4. A graphic designer would MOST likely need which input device in addition to a keyboard and mouse?
(A) Barcode reader
(B) Graphics tablet with stylus
(C) MICR reader
(D) Joystick
5. Which of the following specifications describes processing speed?
(A) 16 GB
(B) 3.2 GHz
(C) 1920 × 1080
(D) 500 GB
Show answers
1. B
2. B
3. B
4. B
5. B
Paper 2 practice (structured question)
Kezia runs a small business making promotional videos and flyers for events in Chaguanas. She sees two computers advertised: Computer X – Intel Core i3, 4 GB RAM, 256 GB HDD; Computer Y – Intel Core i7, 16 GB RAM, 1 TB SSD, dedicated graphics card.
(a) State which computer is more suitable for Kezia’s business. (1 mark)
(b) Justify your answer by referring to THREE of the specifications given. (3 marks)
(c) Other than the computer itself, identify ONE output device and ONE item of software Kezia will need. (2 marks)
(d) Explain why Computer X would still be suitable for a different user, naming the user. (2 marks)
Total: 8 marks
Show answers
(a) Computer Y (1).
(b) One mark each, max 3:
• the Core i7 is faster, so videos render/export more quickly
• 16 GB RAM allows large video and image files to be edited smoothly
• the 1 TB SSD gives more and faster storage for large video files
• the dedicated graphics card speeds up video processing and display
(c) Output device, e.g. colour printer/high-resolution monitor/speakers (1); software, e.g. video-editing software/desktop publishing software/graphics software (1).
(d) A suitable user, e.g. a student or someone who only browses the web/types documents (1); because these tasks need little processing power, memory or storage, so X is cheaper and adequate (1).
Next: Troubleshooting Basic Computer Hardware Problems
Syllabus link: This post is relevant to the CSEC® Information Technology Syllabus (CXC 30/G/SYLL 17), Section 1: Computer Fundamentals and Information Processing, Specific Objective 9 (“evaluate the suitability of a given computer system for a specific purpose”).
Attributions to media used in this post:
- RAM Module (SDRAM-DDR4).jpg – ElooKoN – CC BY-SA 4.0 (via Wikimedia Commons)
Updates
2026/10/16
– Shuffled the answer options in the “Try it: Which computer for which job?” activity so they no longer appear in the same order as the questions.
– Lists and algorithms laid out line by line.
© 2026 Vedesh Kungebeharry. All rights reserved.
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