Hardware Essentials Lab

Master PC hardware components for A+ certification

6 Exercises 90-120 minutes A+ Core 1

Learning Objectives

1

CPU Identification & Specifications

Beginner

The CPU (Central Processing Unit) is the brain of the computer. Understanding CPU specifications is essential for system building and troubleshooting.

Key CPU Specifications

Specification Description Example
Cores Physical processing units 8 cores
Threads Virtual cores (with hyperthreading) 16 threads
Clock Speed Operating frequency 3.6 GHz base, 5.0 GHz boost
TDP Thermal Design Power (heat output) 125W
Socket Physical connection to motherboard LGA 1700, AM5
Cache Fast on-chip memory (L1, L2, L3) 32MB L3

Common CPU Sockets

Intel LGA 1700
12th-14th Gen Core
AMD AM5
Ryzen 7000 series
Intel LGA 1200
10th-11th Gen Core
AMD AM4
Ryzen 1000-5000

Tasks

  • Identify your CPU model using System Information or CPU-Z
  • List the core count, thread count, and base/boost clock speeds
  • Determine the TDP and socket type
  • Research what cooler is recommended for this TDP
  • Compare specs to a CPU from the other manufacturer (Intel vs AMD)
How to Check CPU Info

Windows: Task Manager → Performance → CPU, or run msinfo32
Linux: lscpu or cat /proc/cpuinfo

Related Visualizers

CPU Architecture
2

Motherboard Components & Form Factors

Beginner

The motherboard connects all components and determines expansion capabilities.

Motherboard Form Factors

Form Factor Dimensions Expansion Slots Use Case
ATX 12" x 9.6" 7 slots Full-size desktops, workstations
Micro-ATX 9.6" x 9.6" 4 slots Budget builds, compact desktops
Mini-ITX 6.7" x 6.7" 1 slot Small form factor, HTPCs
E-ATX 12" x 13" 7+ slots High-end workstations, servers

Key Motherboard Components

┌─────────────────────────────────────────────────────┐ │ [I/O Panel] [USB] [Audio] [LAN] [Video] │ ├─────────────────────────────────────────────────────┤ │ ┌────┐ ┌──────────────────┐ │ │ │CPU │ [RAM] [RAM] [RAM] │ PCIe x16 │ │ │ │SOCK│ [RAM] │ (Graphics) │ │ │ └────┘ └──────────────────┘ │ │ ┌──────────────────┐ │ │ [Chipset] │ PCIe x4 │ │ │ └──────────────────┘ │ │ ┌─────────────┐ ┌──────────────────┐ │ │ │ M.2 NVMe │ │ PCIe x1 │ │ │ └─────────────┘ └──────────────────┘ │ │ │ │ [SATA Ports] [USB Headers] [Front Panel] │ │ ○ ○ ○ ○ ═══ ═══ ▪▪▪▪▪▪▪▪ │ ├─────────────────────────────────────────────────────┤ │ [24-pin ATX] [8-pin CPU] │ └─────────────────────────────────────────────────────┘

Tasks

  • Identify your motherboard form factor
  • Count the RAM slots and maximum supported RAM
  • List all expansion slots (PCIe x16, x4, x1)
  • Identify storage connections (M.2 slots, SATA ports)
  • Locate the chipset and research its capabilities

Related Visualizers

Motherboard Explorer
3

RAM Types & Installation

Intermediate

RAM (Random Access Memory) is volatile storage for active programs and data. Matching RAM to your motherboard is critical.

DDR Generations

Type Speed Range Voltage Pins (DIMM)
DDR3 800-2133 MHz 1.5V 240 pins
DDR4 2133-5333 MHz 1.2V 288 pins
DDR5 4800-8400+ MHz 1.1V 288 pins*

*DDR5 has a different notch position than DDR4, preventing cross-installation.

Dual-Channel Configuration

Optimal: Install RAM in matching slots for dual-channel Slot 1 Slot 2 Slot 3 Slot 4 │ │ │ │ ┌─┴─┐ ┌─┴─┐ ┌─┴─┐ ┌─┴─┐ │ A │ │ B │ │ A │ │ B │ └───┘ └───┘ └───┘ └───┘ 2 sticks: Use A1 + A2 (slots 1 & 3) - NOT 1 & 2! 4 sticks: Fill all slots

Tasks

  • Check your installed RAM type and speed using Task Manager or CPU-Z
  • Verify if dual-channel is enabled (check memory controller mode)
  • Research the maximum RAM capacity your motherboard supports
  • Calculate the bandwidth of your RAM (Speed × 8 bytes = GB/s)
  • Check if XMP/DOCP profiles are enabled in BIOS
RAM Bandwidth Calculation

DDR4-3200: 3200 MHz × 8 bytes = 25.6 GB/s per channel
Dual-channel: 25.6 × 2 = 51.2 GB/s total

Related Visualizers

RAM Types
4

Storage Technologies

Intermediate

Understanding storage options helps you balance speed, capacity, and cost.

Storage Comparison

Type Interface Speed Use Case
HDD (7200 RPM) SATA III ~150 MB/s Bulk storage, backups
SATA SSD SATA III ~550 MB/s General purpose, boot drive
NVMe SSD (PCIe 3.0) M.2 / PCIe ~3,500 MB/s Performance, gaming
NVMe SSD (PCIe 4.0) M.2 / PCIe ~7,000 MB/s Professional workloads
NVMe SSD (PCIe 5.0) M.2 / PCIe ~12,000 MB/s Cutting-edge performance

Physical Form Factors

3.5" HDD
Desktop hard drives
2.5" SSD/HDD
Laptops, SATA SSDs
M.2 2280
NVMe SSDs (22mm × 80mm)
U.2
Enterprise NVMe

Tasks

  • Identify your storage devices using Disk Management or CrystalDiskInfo
  • Check the interface type (SATA, NVMe, etc.)
  • Run a benchmark to measure read/write speeds
  • Check S.M.A.R.T. data for drive health
  • Plan an optimal storage configuration (OS on NVMe, data on HDD)

Related Visualizers

Storage Devices RAID Storage
5

Power Supply Selection & Calculation

Intermediate

The PSU (Power Supply Unit) must provide adequate, stable power for all components.

PSU Efficiency Ratings (80 PLUS)

Rating Efficiency @ 50% Load Tier
80 PLUS 80% Budget
80 PLUS Bronze 85% Value
80 PLUS Gold 90% Recommended
80 PLUS Platinum 92% Premium
80 PLUS Titanium 94% Enthusiast

Power Requirement Estimation

Sample System Power Budget: Component TDP/Power Draw ───────────────────────────────────── CPU (i7-13700K) 125W (253W max) GPU (RTX 4070) 200W Motherboard 50W RAM (32GB DDR5) 10W NVMe SSD 10W Case Fans 15W ───────────────────────────────────── Total ~410W typical ~540W peak Recommendation: 650W-750W PSU (50-60% headroom)

Tasks

  • Calculate your system's total power consumption
  • Check your current PSU wattage and efficiency rating
  • Identify all power connectors (24-pin, 8-pin CPU, PCIe)
  • Use an online PSU calculator to verify requirements
  • Research modular vs non-modular PSU benefits
PSU Sizing Rule

Add 20-30% headroom to your calculated power needs. PSUs are most efficient at 40-60% load. A 550W system should use a 750W PSU.

Related Visualizers

Power Supplies
6

Expansion Cards & Interfaces

Beginner

Expansion cards add capabilities through PCIe and other slots.

PCIe Slot Types

Slot Bandwidth (PCIe 4.0) Common Uses
PCIe x16 32 GB/s Graphics cards, high-end NVMe
PCIe x8 16 GB/s Secondary GPUs, RAID cards
PCIe x4 8 GB/s NVMe SSDs, capture cards
PCIe x1 2 GB/s Sound cards, USB expansion, NICs

Common Expansion Cards

Graphics Card
PCIe x16
Network Card
PCIe x1/x4
Sound Card
PCIe x1
Capture Card
PCIe x4

Tasks

  • List all expansion cards currently installed in your system
  • Identify which PCIe slot each card uses
  • Check if your GPU is using the primary x16 slot
  • Research what happens when you put an x16 card in an x4 slot
  • Identify available slots for potential upgrades

Related Visualizers

Expansion Cards

Final Reflection

If you were building a new PC today, what components would you choose and why? Consider your budget and use case.