Dell GX520 - OptiPlex - 512 MB RAM User's Guide Page 49
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processor —
A computer chip that interprets and executes program instructions. Sometimes the processor is referred to as the CPU (central processing unit).
program — Any software that processes data for you, including spreadsheet, word processor, database, and game packages. Programs require an operating
system to run.
PS/2 — personal system/2 — A type of connector for attaching a PS/2-compatible keyboard, mouse, or keypad.
PXE — pre-boot execution environment — A WfM (Wired for Management) standard that allows networked computers that do not have an operating system to
be configured and started remotely.
R
RAID — redundant array of independent disks — Amethodofprovidingdataredundancy.SomecommonimplementationsofRAIDincludeRAID0,RAID1,
RAID5,RAID10,andRAID50.
RAM — random-access memory — The primary temporary storage area for program instructions and data. Any information stored in RAM is lost when you shut
down your computer.
readme file — A text file included with a software package or hardware product. Typically, readme files provide installation information and describe new
product enhancements or corrections that have not yet been documented.
read-Only — Data and/or files you can view but cannot edit or delete. A file can have read-only status if:
¡ It resides on a physically write-protected floppy disk, CD, or DVD.
¡ It is located on a network in a directory and the system administrator has assigned rights only to specific individuals.
refresh rate — The frequency, measured in Hz, at which your screen's horizontal lines are recharged (sometimes also referred to as its vertical frequency). The
higher the refresh rate, the less video flicker can be seen by the human eye.
resolution — The sharpness and clarity of an image produced by a printer or displayed on a monitor. The higher the resolution, the sharper the image.
RFI — radio frequency interference — Interference that is generated at typical radio frequencies, in the range of 10 kHz to 100,000 MHz. Radio frequencies are
at the lower end of the electromagnetic frequency spectrum and are more likely to have interference than the higher frequency radiations, such as infrared
and light.
ROM — read-only memory — Memory that stores data and programs that cannot be deleted or written to by the computer. ROM, unlike RAM, retains its
contents after you shut down your computer. Some programs essential to the operation of your computer reside in ROM.
RPM — revolutions per minute — The number of rotations that occur per minute. Hard drive speed is often measured in rpm.
RTC — real time clock — Battery-powered clock on the system board that keeps the date and time after you shut down the computer.
RTCRST — real-time clock reset — A jumper on the system board of some computers that can often be used for troubleshooting problems.
S
ScanDisk — A Microsoft utility that checks files, folders, and the hard disk's surface for errors. ScanDisk often runs when you restart the computer after it has
- Mini Tower Computer 1
- Desktop Computer 1
- Small Form Factor Computer 1
- Advanced Features 2
- Security 3
- Password Protection 3
- System Password 4
- Administrator Password 5
- System Setup 6
- System Setup Options 7
- Boot Sequence 9
- Booting to a USB Device 10
- Clearing CMOS Settings 12
- Hyper-Threading 12
- Power Management 13
- Battery 14
- Before You Begin 16
- Chassis Intrusion Switch 20
- Cleaning Your Computer 23
- Desktop Computer 26
- Finding Information 27
- Operating System CD 28
- Getting Help 30
- Problems With Your Order 31
- Product Information 31
- Before You Call 32
- Contacting Dell 32
- Glossary 41
- Memory 53
- Removing Memory 54
- Mini Tower Computer 59
- PCI Express Cards 67
- Removing a PCI Express Card 69
- Removing a Hard Drive 76
- Adding a Second Hard Drive 78
- Drive-Panel Inserts 79
- Power Supply 101
- DC Power Connectors 102
- DC Power Connector P2 103
- DC Power Connector P4 103
- DC Power Connector P7 103
- FCC Notices (U.S. Only) 109
- Drivers 113
- Creating a Restore Point 114
- Before You Begin 115
- Reinstalling Windows XP 116
- Removing the System Board 118
- Desktop System Board Screws 119
- Replacing the System Board 120
- Desktop Computer 121
- Back View 122
- Back-Panel Connectors 122
- Inside Your Computer 123
- System Board Components 124
- Jumper Settings 124
- PCI Cards 126
- Removing a PCI Card 127
- Serial Port Adapters 132
- Drives 136
- CD/DVD Drive 137
- Installing a CD/DVD Drive 138
- Floppy Drive 139
- Installing a Floppy Drive 140
- Hard Drive 141
- Installing a Hard Drive 142
- I/O Panel 144
- Processor 146
- Installing the Processor 147
- DC Power Connector P3 152
- DC Power Connector P5 and P6 152
- Back to Contents Page 157
- Front View 158
- PCI Cards 163
- Abbreviations and Acronyms 185
- Small Form Factor Computer 185
- Solving Problems 186
- Keyboard Problems 187
- A program stops responding 188
- A program crashes repeatedly 188
- A solid blue screen appears 188
- Memory Problems 189
- Mouse Problems 189
- Network Problems 190
- Power Problems 190
- Printer Problems 191
- Restoring Default Settings 192
- Sound and Speaker Problems 192
- Video and Monitor Problems 193
- Mini Tower Computer 204
- Dell Diagnostics 206
- System Lights 207
- Diagnostic Lights 208
- Beep Codes 209
- Error Messages 210
- Microsoft 212
- Windows 212
- Warranty 223
- Adding User Accounts 225
- Fast User Switching 225
- Network Setup Wizard 225
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