Module 01

Morning Recall Session

Let's check what stuck from Day 1. Click cards to reveal answers.

What is a Core?

CPU Architecture

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A Core is a "Worker"

It's an independent processing unit inside the CPU. More cores = more workers doing tasks simultaneously.

RAM vs. Storage?

Memory Hierarchy

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Short-term vs. Long-term

RAM: Fast, temporary workspace for active apps. Clears when off.
Storage: Slower, permanent library for files. stays when off.

GPU's Main Job?

Graphics Processing Unit

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Parallel Processing

Designed to handle thousands of tiny tasks at once (like pixels on a screen), unlike a CPU which focuses on complex logic.

Chipset's Role?

Motherboard Anatomy

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Traffic Controller

It manages data flow between the CPU, RAM, and peripherals. It decides what features (overclocking, USB ports) your board has.

Did You Master This?

Be honest! Check off what you are confident about.

I understand why Virtualization must be enabled in BIOS.
I know the difference between HDMI and DisplayPort.
I know how to apply Thermal Paste correctly (pea size!).
I can explain why SSD is faster than HDD.
I understand Boot Priority (USB vs OS drive).

🏆 Golden Rules of Hardware

Rule #1

A system is only as fast as its slowest component. (Bottleneck Rule)

Rule #2

Heat is the enemy of performance. Airflow matters.

Rule #3

Compatibility First! CPU must match Socket. RAM must match DDR generation.

📘 Complete Day 1 Revision

A detailed recap of everything we covered. Scroll to review.

CPU: The Brain

1. Cores & Threads

  • Cores (Workers): Physical processing units. More cores = more multitaskers.
  • Threads (Task Lines): Virtual lines that allow one core to handle 2 tasks (Hyper-threading).
  • Clock Speed (GHz): How fast a worker works. High GHz = fast single app speed.

2. Intel vs AMD

🔵 Intel

High clock speeds. Great for Office, Legacy apps, Single-core performance.

🔴 AMD

More cores per dollar. Excellent for Multitasking, Coding, Rendering.

Motherboard: The Backbone

1. Chipsets Decision

  • H-Series / A-Series: Budget. No overclocking. Basic features.
  • B-Series: Balanced. Best value for students/gamers.
  • Z-Series / X-Series: Enthusiast. Overclocking supported.

2. VRMs (Voltage Regulator Modules)

They convert power for the CPU. Weak VRMs = CPU throttles and slows down under load.

RAM: The Workspace

1. Capacity Rule

  • 8GB: Bare minimum for browsing.
  • 16GB: Sweet spot for coding/gaming.
  • 32GB+: Required for AI/ML and Video Editing.

2. Dual Channel (2 Sticks vs 1)

Always use 2 sticks (e.g., 2x8GB) instead of 1 stick (1x16GB). It doubles the data highway width.

XMP/EXPO: You must enable this in BIOS to get advertised speeds!

GPU: The Artist

1. Integrated vs Dedicated

  • iGPU: Built into CPU. Fine for office/video. Uses system RAM.
  • Dedicated GPU: Separate card. Has own VRAM. Essential for Gaming/AI.

2. VRAM Matters

Video RAM stores textures and AI models. 8GB is the new minimum for 1080p gaming.

Storage: Long Term Memory

Type Speed Best For
HDD Slow Mass archiving
SATA SSD Fast (500MB/s) Standard use
NVMe Gen4 Insane (7000MB/s) OS, Gaming, AI

PSU: The Heart

1. Never Cheap Out

A bad PSU can fry your PC. Look for 80+ Gold ratings.

2. Modular Cables

Modular: Only plug in cables you need (better airflow).
Non-Modular: All cables attached (messy).

⚠️ WARNING: Never mix modular cables between different PSUs! Pinouts differ.

🛠️ Troubleshooting & Diagnostics

A systematic approach to solving hardware and software problems.

1. Introduction to Troubleshooting

Troubleshooting is a systematic process of identifying, diagnosing, and resolving problems. It is not guessing. It is a logical problem-solving approach.

2. Standard Methodology (Industry Approach)

Step 1: Identify

  • Ask user what happened
  • Check error messages
  • Note recent changes

Step 2: Theorize

  • Hardware or Software?
  • Recent update?
  • Overheating? Virus?

Step 3: Test

  • Run diagnostics
  • Safe Mode
  • Check components

Step 4: Fix

  • Repair / Replace
  • Update / Rollback
  • Reinstall

Step 5: Verify

  • Restart & Test
  • Check Internet
  • Stress test

Step 6: Document

  • Write problem & fix
  • Preventive advice

3. Understanding Components (Faults)

Component Role Failure Symptom
CPU Brain Overheating loops / Shutdown
RAM Temp Memory BSOD / Crashes / No Display
Storage OS/Files Slow boot / Corrupt files
PSU Power No power / Random restarts
Motherboard Connection Dead system / No POST

4. Drivers: The Software Bridge

A driver allows the OS to talk to hardware. Without it, hardware fails (e.g., No Wi-Fi, Poor graphics).

Symptoms of Driver Issues

  • Wi-Fi not showing
  • No Sound
  • Low resolution display
  • Yellow warning in Device Manager

How to Troubleshoot

  1. Open Device Manager.
  2. Look for Yellow Warning Signs.
  3. Right Click > Update / Rollback / Reinstall.
  4. Best Fix: Download official driver from Laptop/Motherboard manufacturer site.
Prevention: Always use official drivers. Avoid "Driver Booster" software.

5. Boot Problems & Fixes

No Power

Check cable, adapter, power button, PSU, and RAM seating.

No Display

Check monitor cable. Reseat RAM. Reset BIOS (CMOS battery). Test external display.

No Bootable Device

Check BIOS boot order. Hard disk might be loose or failed. OS might be corrupt.

6. Slow Performance

Common Causes

  • Low RAM / Full Storage
  • Too many startup apps
  • Old HDD (Upgrade to SSD!)
  • Malware / Background updates

Fix It

  • Check Task Manager (Ctrl+Shift+Esc).
  • Disable startup apps.
  • Scan for malware.
  • Ultimate Fix: Upgrade to SSD + RAM.

7. Overheating Issues

Symptoms

Sudden shutdown, Loud fan, Lag during heavy work.

Causes

Dust, Dried thermal paste, Blocked vents.

Fixes

Clean dust, Repaste CPU, Use Cooling Pad.

8. Blue Screen of Death (BSOD)

Windows crash screen indicating system failure.

Troubleshooting Steps

  • Note the Error Code.
  • Boot into Safe Mode.
  • Run Memory Diagnostic (Check RAM).
  • Update Drivers.
  • Run sfc /scannow in Command Prompt.

9, 10, 11. Network, Virus & BIOS

Network Issues

Check Router > Restart Modem > Check Driver > Flush DNS (ipconfig /flushdns).

Virus & Malware

Symptoms: Slow system, Popups. Fix: Run Antivirus, Reset Browser, Reinstall OS.

BIOS Issues

Controls hardware init. Problems: Boot order, Date resets (CMOS dead). Fix: Reset BIOS defaults.

12, 13, 14. Advanced Diagnostics & Maintenance

Hardware Failure Signs

Clicking sound (HDD), Beep codes, Burning smell, Random electrical shutdowns.

Diagnostic Tools

  • Windows Memory Diagnostic
  • SMART Disk Check
  • Event Viewer Logs
Preventive Maintenance: Clean dust regularly. Use genuine antivirus. Keep drivers updated. Backup data. Monitor temps.

Storage: Long Term Memory

Type Speed Best For
HDD Slow Mass archiving
SATA SSD Fast (500MB/s) Standard use
NVMe Gen4 Insane (7000MB/s) OS, Gaming, AI

PSU: The Heart

1. Never Cheap Out

A bad PSU can fry your PC. Look for 80+ Gold ratings.

2. Modular Cables

Modular: Only plug in cables you need (better airflow).
Non-Modular: All cables attached (messy).

⚠️ WARNING: Never mix modular cables between different PSUs! Pinouts differ.
I'm Ready for Day 2