Compare and Contrast Desktop and Laptop Expansion Capabilities
Expansion capabilities add functionality to a computer. Many expansion devices can be used with both laptops and desktops:
■ External drives
■ Network cards
■ Wireless adapters
■ Printers
■ Other peripherals
Expansion devices are attached to laptops and desktops differently. A desktop attaches these devices with USB ports and parallel ports. A laptop attaches these devices with USB ports, parallel ports, and PC Cards.
The standardized use of USB and FireWire ports makes it possible to connect many types of external components to laptops, docking stations, port replicators, and desktops. The USB and FireWire standards make it possible to connect and remove external components without the need to power off the system. USB and FireWire ports are used to connect a range of external components:
■ Printers
■ Floppy disk drives
■ Keyboards
■ Optical drives
■ MP3 players
Laptops and desktops have similar expansion capabilities. The difference in form factor between the computers determines which type of expansion device is used. Desktops have internal bays that support 5.25-inch and 3.5-inch drives. Additionally, there is space to install other permanent expansion drives. Laptops have limited space, so the expansion bays on laptops are designed to allow different types of drives to fit into the same bay. Drives are hot swappable and are inserted or removed as needed.
Table 6-2 shows a comparison of desktop and laptop expansion components.
|
Laptops |
Desktops |
||||
|
External |
External |
||||
|
Ports |
Ports |
||||
|
(USB, |
(USB, |
||||
|
Parallel, |
Parallel, |
||||
|
Video, |
Video, |
||||
|
FireWire, |
Adapter |
FireWire, |
|||
|
Component |
PC Card |
Integrated |
Serial) |
Integrated Card |
Serial) |
|
External |
X |
X |
|||
|
monitor |
|||||
|
Printer |
X |
X |
|||
|
Keyboard |
X |
X |
X |
||
|
Mouse |
X |
X |
|||
|
External |
X |
X |
|||
|
drives |
|||||
|
Ethernet |
X |
X |
X |
XX |
X |
|
NIC |
|
Table 6-2 |
Laptop and Desktop Expansion Components continued |
|||
|
Laptops |
Desktops |
|||
|
External |
External |
|||
|
Ports |
Ports |
|||
|
(USB, |
(USB, |
|||
|
Parallel, |
Parallel, |
|||
|
Video, |
Video, |
|||
|
FireWire, |
Adapter |
FireWire, |
||
|
Component |
PC Card Integrated |
Serial) |
Integrated Card |
Serial) |
|
Wireless |
X X |
X |
XX |
X |
|
NIC |
||||
|
CD/DVD |
X |
X |
||
|
drives |
||||
|
Drive |
X |
XX |
||
|
controllers |
||||
Laptops use the PC Card slot to add functionality. The PC Card slot uses an open standard interface to connect to peripheral devices using the CardBus standard. Examples of devices that connect using PC Cards include the following:
■ Hard drives
■ Network cards
PC Cards follow the PCMCIA standard. They come in three types: Type I, Type II, and Type III. Each type of PC Card is different in size and can attach to different devices. A newer type of PC Card is called the PC ExpressCard.
Table 6-3 shows a comparison of PC Cards.
|
PC Bus |
Size (mm) |
Thickness (mm) |
Interface |
Examples |
|
Type I |
85.6 x 54 |
3.3 |
Memory, I/O, CardBus |
SRAM flash |
|
Type II |
85.6 x 54 |
5.5 |
Memory, I/O, CardBus |
Modem LAN wireless |
|
Type III |
85.6 x 54 |
10.5 |
Memory, I/O, CardBus |
Hard drive |
Table 6-4 compares PC ExpressCards.
|
Express Bus |
Size (mm) |
Thickness (mm) |
Interface |
Examples |
|
Express Card/34 |
75 x 34 |
5 |
PCI Express or USB 2.0 |
FireWire, TV tuner, wireless NIC |
|
Express Card/54 |
75 x 54 |
5 |
PCI Express or USB 2.0 |
Smart Card reader, Compact Flash reader, 1.8-inch disk drive |
The PC ExpressCard has 34-pin and 54-pin configurations. Figure 6-13 shows an example of a PC Card and PC ExpressCards.
Figure 6-13 Laptop Expansion Cards
Figure 6-13 Laptop Expansion Cards
PC-Card
PC-Card
PC ExpressCard/54
PC ExpressCard/54
|^-54 mm-H PC ExpressCard/34
Worksheet 6.3.4: Answer Laptop Expansion Questions
Fill in the table and short answer questions on laptop expansion specifications. Refer to the worksheet in IT Essentials: PC Hardware and Software Labs and Study Guide, Third Edition (ISBN 1-58713-198-6). You can perform this worksheet now or wait until the end of the chapter.
Continue reading here: Explain How to Configure Laptops
Was this article helpful?