Summary
Summary IT Grade 11 IEB summaries
- Course
- Institution
Summaries for Grade 11 IT IEB theory according to the SAGS document
[Show more]
1 review
By: carolroblin • 4 days ago
By: bernardu • 4 days ago
Thank you for your purchase Carol!
Seller
Follow
bernardu
Reviews received
Content preview
L.lt 2 .:
Hardware
CPU
Design
Control Unit ( CU )
Controls execution of each instruction .
using the system dock .
↳ Data fetched from stored CU ALU
registers
in
memory
or
Arithmetic Unit CALU)
Logic
Does calculations and
logical comparisons
↳ Stored in accumulator
Registers
store current instructions and its data
↳
Registers are static RAM ( SRAM)
fast
Very
↳
Serial
Processing
Processing 7 instruction at a time .
Parallel Processing
Breaking up and
running instructions on
multiple microprocessors
↳ Allowed
Hyperthreading :
processor Go
sets of instructions
appear
to execute 2
simultaneously
↳ CPU
.
appears
like 2
logical CPU's
Multiprocessing Having :
multiple cores on
single CPU
↳ 2
physical cores
hyperthreaded into 4
logical cores
Processor Cache
Stores data thatso future requests can be served faster
↳ SRAM
Cache Memory Levels :
7. Ll chip same speed :
as CPU internal speed
Small amount
memory
of
2. L2 chip :
Smaller than 11 ; Half the speed
Cache located on CPU
3. 13 chip :
larger and slower
On motherboard
CPU checks 11 then 12 then 13 then RAM
,RAM
-
Stores currently used t data
programs
-
Most common RAM :
Double Data Rate (DDR) SDRAM
DRAM RAM
Dynamic
- -
-
SDRAM
Synchronous DRAM
- :
Latency
Time taken for component to
respond
Types of
Memory
7 .
Registers
2 .
On chip cache
3 .
Off chip cache
4 Main
memory
.
Local
storage
5 .
secondary
b. Remote
secondary storage
Motherboard
Connects components devices
together
-
t
System Clock
Microchip that
regulates timing t
speed of
computer functions
Overclocking
Achieved
by : •
Increasing system clock Per Component :
CPU
changes own clock
•
Increase clock multiplication factor
Whole
↳ AKA Clock Multiplication
System System clock is
changes
:
.
Speed us .
Throughput
Speed : Bandwidth theoretical speed of data
-
Throughput : Actual data speed .
Front side Bus / Internal Bus
CPU and RAM
FBS
Usually connect
:
Data Bus
Transfer info or data between CPU and RAM
Control Bus
Carries commands between CPU and RAM
, External Busses
To attach external devices
↳ PCIe Connect
:
GPU ; RAID card ; Wifi card i SSD
SATA Connect
:
mass
storage device to motherboard
Serial Advanced Technology Attachment
USB :
Standardise connection of peripherals
NV Me :
Non Volatile
Memory Express : connect SSD to motherboard
M 2.
:
Increase SSD speed ,
decrease size
Other of
types Caching
Caching technique nob limited to CPU
Disk Cache
Hardware mechanism to improve read Iwrite speeds Go HD
↳ Stored in RAM
Browser Cache
When website is accessed ,
copy
of site s bored in browser cache
↳ Stored on HDD
Website will load faster after saved .
Web Cache
Stores accessed web network
recently
in
pages on a server a
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller bernardu. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $5.65. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
62890 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now