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HP dc73 Service Reference Guide - HP Compaq dc7800 Business PC - Page 129

Populating DIMM Sockets

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Populating DIMM Sockets There are four DIMM sockets on the system board, with two sockets per channel. The sockets are labeled DIMM1, DIMM2, DIMM3, and DIMM4. Sockets DIMM1 and DIMM2 operate in memory channel A. Sockets DIMM3 and DIMM4 operate in memory channel B. Item Description Socket Color 1 DIMM1 socket, Channel A Black 2 DIMM2 socket, Channel A White 3 DIMM3 socket, Channel B White 4 DIMM4 socket, Channel B White NOTE: A DIMM must occupy the black DIMM1 socket. Otherwise, the system will display a POST error message indicating that a memory module must be installed in the black socket. The system will automatically operate in single channel mode, dual channel mode, or flex mode, depending on how the DIMMs are installed. ● The system will operate in single channel mode if the DIMM sockets are populated in one channel only. ● The system will operate in a higher-performing dual channel mode if the total memory capacity of the DIMMs in Channel A is equal to the total memory capacity of the DIMMs in Channel B. The technology and device width can vary between the channels. For example, if Channel A is populated with two 512-MB DIMMs and Channel B is populated with one 1GB DIMM, the system will operate in dual channel mode. ● The system will operate in flex mode if the total memory capacity of the DIMMs in Channel A is not equal to the total memory capacity of the DIMMs in Channel B. In flex mode, the channel populated with the least amount of memory describes the total amount of memory assigned to dual channel and the remainder is assigned to single channel. For optimal speed, the channels should be balanced so that the largest amount of memory is spread between the two channels. If one channel will have more memory than the other, the larger amount should be assigned to Channel A. For example, if you are populating the sockets with one 1-GB DIMM, and three 512-MB DIMMs, Channel A should be populated with the 1-GB DIMM and one 512-MB DIMM, and Channel B should Installing Additional Memory 117

Section	Page
Installing and Customizing the Software	13
Installing the Operating System	13
Installing or Upgrading Device Drivers	13
HP Backup and Recovery Manager	14
Computer Setup (F10) Utility	15
Computer Setup (F10) Utilities	15
Using Computer Setup (F10) Utilities	16
Computer Setup—File	17
Computer Setup—Storage	18
Computer Setup—Security	20
Computer Setup—Power	23
Computer Setup—Advanced	24
Recovering the Configuration Settings	26
Computer Diagnostic Features	27
HP Insight Diagnostics	27
Accessing HP Insight Diagnostics	27
Survey Tab	28
Test Tab	29
Status Tab	29
Log Tab	30
Help Tab	30
Saving and Printing Information in HP Insight Diagnostics	31
Downloading the Latest Version of HP Insight Diagnostics	31
Protecting the Software	31
HP Backup and Recovery Manager	32
Desktop Management	33
Initial Configuration and Deployment	33
HP OpenView Agent	34
Altiris Deployment Solution Agent	34
Verdiem Surveyor Client Side Installation	35
Remote System Installation	35
Software Updating and Management	36
HP Client Management Interface	36
HP System Software Manager	37
HP Client Manager	37
HP ProtectTools Security Manager	38
HP Client Premium Suite	39
HP Client Foundation Suite	39
HP OpenView Client Configuration Manager	39
HP OpenView PC Configuration Management Solution	40
HP Client Catalog for SMS	40
HP Backup and Recovery Manager	40
Intel vPro-branded PCs with Active Management Technology	41
HP Proactive Change Notification	43
Subscriber’s Choice	43
Retired Solutions	43
ROM Flash	43
Remote ROM Flash	44
HPQFlash	44
Boot Block Emergency Recovery Mode	44
Replicating the Setup	45
Copying to Single Computer	45
Copying to Multiple Computers	46
Creating a Bootable Device	47
Supported USB Flash Media Device	47
Unsupported USB Flash Media Device	48
Dual-State Power Button	49
HP Web Site Support	50
Industry Standards	50
Asset Tracking and Security	50
Password Security	53
Establishing a Setup Password Using Computer Setup	53
Establishing a Power-On Password Using Computer Setup	53
Entering a Power-On Password	53
Entering a Setup Password	54
Changing a Power-On or Setup Password	54
Deleting a Power-On or Setup Password	55
National Keyboard Delimiter Characters	55
Clearing Passwords	55
DriveLock	56
Using DriveLock	56
DriveLock Applications	56
Smart Cover Sensor	57
Setting the Smart Cover Sensor Protection Level	57
Smart Cover Lock	57
Locking the Smart Cover Lock	58
Unlocking the Smart Cover Lock	58
Using the Smart Cover FailSafe Key	58
Cable Lock Provision	59
Fingerprint Identification Technology	59
Fault Notification and Recovery	59
Drive Protection System	59
Surge-Tolerant Power Supply	59
Thermal Sensor	59
Serial and Parallel ATA Drive Guidelines and Features	60
SATA Hard Drives	60
SATA Hard Drive Cables	61
SATA Data Cable	61
SATA Power Cable	61
PATA Device Information	62
ATA SMART Drives	62
Hard Drive Capacities	62
Identifying the Chassis, Routine Care, and Disassembly Preparation	63
Chassis Designations	63
Convertible Minitower (CMT)	63
Small Form Factor (SFF)	64
Ultra-Slim Desktop (USDT)	64
Electrostatic Discharge Information	65
Generating Static	65
Preventing Electrostatic Damage to Equipment	65
Personal Grounding Methods and Equipment	66
Grounding the Work Area	66
Recommended Materials and Equipment	66
Operating Guidelines	67
Routine Care	68
General Cleaning Safety Precautions	68
Cleaning the Computer Case	68
Cleaning the Keyboard	68
Cleaning the Monitor	69
Cleaning the Mouse	69
Service Considerations	69
Power Supply Fan	69
Tools and Software Requirements	69
Screws	70
Cables and Connectors	70
Hard Drives	70
Lithium Coin Cell Battery	71
Removal and Replacement Procedures Convertible Minitower (CMT) Chassis	72
Preparation for Disassembly	72
Unlocking the Smart Cover Lock	73
External Security Devices	74
Installing a Cable Lock	74
Installing a Padlock	74
Hood Sensor	75
Computer Access Panel	76
Front Bezel	77
Bezel Blanks	78
Cable Management	79
Cable Connections	80
Memory	81
Expansion Cards	84
Drives	88
System Board Drive Connections	90
Drive Positions	91
Installing a 3.5-inch Hard Drive into an Internal Drive Bay	92
Removing and Replacing a Removable 3.5-inch SATA Hard Drive	94
Installing a 5.25-inch or 3.5-inch Drive into an External Drive Bay	99
ReadyBoost Card	101
Front I/O Device and Power Switch	102
Fan Shroud	103
Heatsink	104
Processor	105
Speaker	106
Rear Chassis Fan	107
Inner Chassis Fan	108
Serial Port	109
Power Supply	110
System Board	111
Battery	112
Type 1 Battery Holder	113
Type 2 Battery Holder	113
Type 3 Battery Holder	114
Changing from a Desktop to a Minitower Configuration	115
Changing from a Minitower to a Desktop Configuration	117
Removal and Replacement Procedures Small Form Factor (SFF) Chassis	119
Preparation for Disassembly	119
Unlocking the Smart Cover Lock	120
Smart Cover FailSafe Key	120
Using the Smart Cover FailSafe Key to Remove the Smart Cover Lock	121
External Security Devices	122
Installing a Security Lock	122
Cable Lock	122
Padlock	122
HP Business PC Security Lock	123
Computer Access Panel	125
Front Bezel	126
Bezel Blanks	127
Installing Additional Memory	128
DIMMs	128
DDR2-SDRAM DIMMs	128
Populating DIMM Sockets	129
Installing DIMMs	130
Expansion Cards	132
Cable Management	136
Cable Connections	137
Drives	138
Drive Positions	138
Installing and Removing Drives	139
System Board Drive Connections	141
Removing an Optical Drive	142
Installing an Optical Drive into the 5.25-inch Drive Bay	143
Removing an External 3.5-inch Drive	146
Installing a Drive into the 3.5-inch External Drive Bay	148
Primary 3.5-inch Internal SATA Hard Drive	150
Removable 3.5-inch SATA Hard Drive	152
ReadyBoost Card	156
Fan Shroud	157
Chassis Fan	158
Power Switch Assembly	159
Front I/O Device	160
Heatsink	161
Processor	162
Speaker	163
Power Supply	164
System Board	165
Backwall	167
Battery	168
Type 1 Battery Holder	169
Type 2 Battery Holder	169
Type 3 Battery Holder	170
Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis	171
Preparation for Disassembly	171
External Security Devices	172
Cable Lock	172
HP Business PC Security Lock	173
Computer Access Panel	175
Front Bezel	176
Bezel Blanks	177
Memory	178
SODIMMs	178
DDR2-SDRAM SODIMMs	178
Populating SODIMM Sockets	179
Installing SODIMMs	179
Cable Management	181
Cable Connections	182
Optical Drive	182
Removing the Optical Drive	182
Preparing a New Optical Drive	183
Installing a New Optical Drive	184
Optical Drive Connector	185
Hard Drive	186
Hard Drive Cage	190
Port Cover	191
ReadyBoost Card	192
Fan	193
Speaker	194
I/O Panel	195
Heatsink	196
Processor	198
System Board	199
Rear Chassis Fan	200
Battery	201
Connector Pin Assignments	203
Keyboard	203
Mouse	203
Ethernet BNC	203
Ethernet RJ-45	204
Ethernet AUI	204
Parallel Interface	205
Serial Interface, Powered and Non-Powered	205
USB	206
Microphone	206
Headphone	206
Line-in Audio	206
Line-out Audio	206
External Infrared Transceiver	207
Monitor	207
ATA/ATAPI (IDE) Standard Drive Cable	208
CD-ROM 50-Pin Connector	209
24-Pin Power	209
24-Pin MicroFit Power (CMT, SFF)	210
4-Pin Power (for CPU)	210
6-Pin Power (for CPU) (CMT, SFF)	210
SATA Data and Power	211
PCI Express	211
PCI Express	212
PCI Express Mini Card	213
DVI Connector	214
Power Cord Set Requirements	215
General Requirements	215
Japanese Power Cord Requirements	215
Country-Specific Requirements	216
POST Error Messages	217
POST Numeric Codes and Text Messages	218
Interpreting POST Diagnostic Front Panel LEDs and Audible Codes	224
Troubleshooting Without Diagnostics	228
Safety and Comfort	228
Before You Call for Technical Support	228
Helpful Hints	229
Solving General Problems	231
Solving Power Problems	234
Solving Diskette Problems	235
Solving Hard Drive Problems	238
Solving Media Card Reader Problems	240
Solving Display Problems	242
Solving Audio Problems	245
Solving Printer Problems	247
Solving Keyboard and Mouse Problems	248
Solving Hardware Installation Problems	249
Solving Network Problems	251
Solving Memory Problems	254
Solving Processor Problems	256
Solving CD-ROM and DVD Problems	256
Solving Drive Key Problems	259
Solving Front Panel Component Problems	259
Solving Internet Access Problems	260
Solving Software Problems	262
Contacting Customer Support	263
System Board and Riser Board Reference Designators	264

Match case Limit results 1 per page

Populating DIMM Sockets

There are four DIMM sockets on the system board, with two sockets per channel. The sockets are

labeled DIMM1, DIMM2, DIMM3, and DIMM4. Sockets DIMM1 and DIMM2 operate in memory channel

A. Sockets DIMM3 and DIMM4 operate in memory channel B.

Item

Description

Socket Color

DIMM1 socket, Channel A

Black

DIMM2 socket, Channel A

White

DIMM3 socket, Channel B

White

DIMM4 socket, Channel B

White

NOTE:

A DIMM must occupy the black DIMM1 socket. Otherwise, the system

will display a POST error message indicating that a memory module must be

installed in the black socket.

The system will automatically operate in single channel mode, dual channel mode, or flex mode,

depending on how the DIMMs are installed.

●

The system will operate in single channel mode if the DIMM sockets are populated in one channel

only.

●

The system will operate in a higher-performing dual channel mode if the total memory capacity of

the DIMMs in Channel A is equal to the total memory capacity of the DIMMs in Channel B. The

technology and device width can vary between the channels. For example, if Channel A is

populated with two 512-MB DIMMs and Channel B is populated with one 1GB DIMM, the system

will operate in dual channel mode.

●

The system will operate in flex mode if the total memory capacity of the DIMMs in Channel A is not

equal to the total memory capacity of the DIMMs in Channel B. In flex mode, the channel populated

with the least amount of memory describes the total amount of memory assigned to dual channel

and the remainder is assigned to single channel. For optimal speed, the channels should be

balanced so that the largest amount of memory is spread between the two channels. If one channel

will have more memory than the other, the larger amount should be assigned to Channel A. For

example, if you are populating the sockets with one 1-GB DIMM, and three 512-MB DIMMs,

Channel A should be populated with the 1-GB DIMM and one 512-MB DIMM, and Channel B should

Installing Additional Memory

117