1. Software & hardware interaction
Unit 2

2. Objectives Identify hardware components that affect performance
Explain how the CPU processes software instructions
Describe types of computer memory
Explain how to use system requirements
Explain the purpose of software updates
Use Windows Updates to keep the OS up to date

3. Motherboard Main circuit board Everything connects to it
Bus lines to transfer data
Everything connects to it
CPU, Heatsink & Fan
RAM
Motherboard

4. CPU Processor aka Microprocessor Single chip Speed of computer
Measured in MHz & GHz
Multicore CPU
Single chip with more than one processor
Intel, AMD, ARM (mobile)
Dual core- single chip with 2 processors
Quad core- single chip with 4 processors
1979= 8 MHz
1993= 200 MHz
2013= 3 GHz

5. RAM- Random Access Memory
Running (active) programs/data are held
Stores what you are creating
Short-term memory
Volatile
Disappears when PC is off
Measured in bytes
Gigabytes (GB)/Megabytes (MB)
8-16GB is standard now
Explain: Typing up a paper and you copy a picture from the Internet. It puts it in temporary memory (RAM). If you copy a picture and shut the computer off, the next time you turn your computer on, you won’t be able to paste the picture. Stuff in RAM goes away with no power.
More RAM, more things you can do at the same time. Not enough RAM, slows down!

6. ROM- Read Only Memory (Flash)
Has instructions to boot your computer
Read only- no store data
BIOS is on ROM
Sometimes referred to as firmware
Info stays when power is off (non-volatile)
Flash memory is currently used but still referred to as ROM.

7. Cache Memory Small amount of memory on and near the CPU
Volatile
Helps process data faster to CPU

8. Heat Sink & Fan CPUs get HOT!! Heat sink dissipates heat
Too hot & it shuts down or gets damaged
Heat sink dissipates heat
Fan keeps it cooled
Tablets & phones don’t have fans as their CPUs are low voltage.

9. Activity Identify parts of the Motherboard Teknimedia A2.3- Processor
A2.5- Memory & Storage Devices
A2.10- Memory Types
A2.11- Storage Devices

10. Review- 4Q What type of memory is non-volatile?
ROM
Which memory is volatile?
RAM
What speed is a CPU measured in?
GHz
Which memory holds your active, running programs or what you copied?

11. Task Manager Shows how it’s handling processes How to get to it:
Ctrl + Alt + Del and click Task Manager
Right-click on Taskbar & select it

12. Updating Software Updates/upgrades from developer’s website
Automatic Updates
May need to restart after
Can set to download & prompt to install
Can turn off completely (manual update)
Web Apps / SaaS
Work through a website; may cost $
No need for you to update them
SaaS- Software as a Service
Office 365 and Adobe Creative Cloud are examples. If you pay for it, the developers will always update/upgrade it and you’ll have the latest software.
Types of OS updates:
Important- critical for security and reliability
Recommended- enhance or repair problems that are not critical
Optional- not critical

13. Review- 3Q
Which component most directly affects your ability to multitask?
RAM
Where should you get/trust computer updates from?
Developer’s website
How do you get to Task Manager using the keyboard?
Ctrl+Alt+Del

14. Activity- Choose One & All Do1 2
3- Everyone
Answer questions about Task Manager on your computer
Screenshot of Performance
Research system requirements for a piece of software
Screenshot System and answer questions based on your computer system at home

15. Software & hardware interaction
Unit 2