getting ready for ohs

Getting Ready for OHS

Open Heart Surgery!

What’s a PC?

• Personal Computer– These computers were originally designed by

IBM in the 70s.

• Your computer at home is a PC.

• The workstations at KLDCS are PCs.

• Someone who uses a PC is called a USER

PC Parts (External)

• Typically, PCs have a Monitor, Tower (or case), a keyboard and a mouse.– Note: Anything you plug into the Tower is

called a “peripheral device” (mouse, speakers, keyboard…)

PC Parts (Internal)

• There are 5 major components that make PCs work:– Hard Drive– CPU– RAM– Mother Board– Power Supply

Hard Drive

• Stores data magnetically (This means it doesn't disappear when the computer is switched off)

• Can store very large quantities of data. (4 Tb+)

Read/write arm swings while the disks all spin

Hard Drive 2

• Usually made of glass or aluminum with a magnetic coating.

Very Shiny, and must be kept perfectly clean!

Hard Drive 3

Cons: • Relatively slow access time. (100 000 times

slower than RAM!)

Pros:• Cheap memory (0.0001 $/mb) • Non-volatile – This means you can turn the computer off and

you don’t loose your stuff.• NOTE: When you click “Save” you are putting your project on the

HD.

CPU

• Central Processing Unit

CPU 2

• Also Called a “Microprocessor”

• Everything that happens in a PC goes through the CPU. (just like your brain)

CPU 3

• CPUs are made of billions of interconnected electric circuits.

• The speed of a CPU is measured in “Hertz” or “how many operations it can perform every second”

• A 2 GHz processor can do up 2 billion things each second!

RAM

RAM

• “Random Access Memory”

• It is REALLY fast memory right near the CPU

• It holds currently running programs

• Stores Data Electronically Volatile!

RAM 2

• Computers these days have around 2-4 Gb of Ram.

• My first computer only had 1 Mb! That’s 2000 times less!

• Having more ram makes your computer faster, because less information needs to go out to the HD.

Mother Board (MOBO)

Mother Board

• The main circuit board in the PC.It Contains:- RAM- CPU- Video Card (Sends the signal to monitor)

- Sound Card (Sends a signal to the speakers)

- Much more!

Mother Boards

• It is the mother board that determines what components you can put in your machine.

EX: If you want a fancy gaming video card, your mobo must be able to support it!

Power Supply

• The power supply converts the 110v AC power from your wall into the very small amounts of power your computer needs to run.

Summary of Components

• Hard drive– Non-volatile, stores info magnetically, very large storage device.

• CPU – The brain! Everything that a PC does goes through the CPU.

• RAM – Really fast memory right by the CPU– Stores data of currently running programs– Stores info electrically

• Mother Board– Brings all the PC parts together

• Power Supply– Converts household power to power a computer can use!