Parts of a Computer and Their Functions
Understand the CPU, motherboard, memory, graphics card, storage, power supply, cooling, and connections.
Identify every PC part →Practical computer knowledge
Computer Guides and Tutorials
Computer Guides and Tutorials help you understand how a PC works, solve problems, plan upgrades, and use Windows with confidence. Every article is written from hands-on systems engineering experience and focuses on one useful answer.
15 focused guides 20+ years of IT experience Free to read
Choose what you want to learn
Start with the goal closest to your question. Each section collects related articles so you can move from a simple explanation to a practical next step.
Understand your computer
Learn what the main parts do, how they work together, and which specifications matter.
View 5 guides →Check a problem before replacing parts
Use clear checks to separate a hardware fault, heat problem, weak connection, or normal software slowdown.
View 6 guides →Improve how your computer works
Plan a worthwhile upgrade, improve cooling, understand electricity use, or adjust a practical Windows setting.
View 4 guides →Computer fundamentals
Understand your computer
Learn what the main parts do, how they work together, and which specifications matter.
Parts of a CPU and Their Functions
Learn how the control unit, ALU, registers, cache, clock, and memory controller work inside a processor.
See how a CPU works →
Parts of a Motherboard and Their Functions
Identify the CPU socket, chipset, memory slots, PCIe slots, storage connectors, BIOS chip, and rear ports.
Identify motherboard parts →
Understanding the BIOS and Its Main Functions
See what happens before Windows starts, including POST, boot selection, hardware settings, Secure Boot, and UEFI.
Understand BIOS startup →
What Is a Monitor and the Various Types
Compare IPS, VA, OLED, and TN panels, along with resolutions, refresh rates, and display connections.
Compare monitor types →Troubleshooting and maintenance
Check a problem before replacing parts
Use clear checks to separate a hardware fault, heat problem, weak connection, or normal software slowdown.
How to Check If RAM Is Working Properly
Confirm the amount and speed, test the memory, isolate a bad stick, and check unstable XMP settings.
Test your computer's RAM →
How to Check If a CPU Is Working Properly
Check startup behavior, temperatures, Windows errors, and stability under a controlled stress test.
Test your CPU safely →
How to Check If a GPU Is Working Properly
Confirm Windows detects the card, check the intended GPU and its fans under load, compare one benchmark, and isolate a likely fault.
Run the GPU checks →
How to Clean RAM Contacts
Clean and reseat a memory stick safely when a weak electrical connection causes startup or stability problems.
Clean RAM contacts safely →
How to Know If Your CPU Is Thermal Throttling
Check temperature limits, clock speed, and throttling indicators without confusing heat limits with power limits.
Check for CPU throttling →
Why Do Computers Slow Down With Age?
Find out whether heavier software, background programs, limited storage, heat, or aging hardware is responsible.
Find the slowdown cause →Upgrades and everyday use
Improve how your computer works
Plan a worthwhile upgrade, improve cooling, understand electricity use, or adjust a practical Windows setting.
How to Upgrade a PC
Choose a useful upgrade, confirm compatibility, install the part safely, and test the finished computer.
Plan your PC upgrade →
PC Airflow Optimization: How to Cool Your Computer
Set up intake and exhaust fans for useful airflow, sensible pressure, lower temperatures, and less dust.
Set up better airflow →
How Much Energy Do Gaming Computers Use?
Estimate real power use, yearly electricity cost, and which settings make the greatest difference.
Estimate gaming PC costs →
How to Set Up Auto Login on Windows 11
Choose from three clear methods to start Windows without entering the account password each time.
Set up automatic login →About these guides
Computer advice grounded in real IT work
Marlo Strydom writes every guide from more than 20 years of experience working with computer hardware, Windows systems, electronics, and technical support. The aim is to explain the subject clearly, test practical steps where possible, and help you make a sensible decision without filler.
This collection will continue to grow across computer hardware, software, networking, maintenance, and everyday technology. If there is a subject you would like covered, you can suggest it through the contact page.
Suggest a computer topic →