HP xw3400 User Manual Page 176
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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
XMM1, XMM2, XMM3, and XMM4. Sockets XMM1 and XMM3 operate in memory channel A. Sockets
XMM2 and XMM4 operate in memory channel B.
Figure F-1 DIMM socket locations
Item Description Socket Color
1 DIMM socket XMM1, Channel A White
2 DIMM socket XMM2, Channel B White
3 DIMM socket XMM3, Channel A
(populate first)
Black
4 DIMM socket XMM4, Channel B
(populate second)
Black
The system will automatically operate in single channel mode or dual channel mode, depending on how
the DIMMs are installed.
●
The system will operate in a higher-performing dual channel mode if like-sized DIMMs of equal
capacity are populated in one or both pairs of sockets. For example, if the Channel A far socket and
Channel B far socket (the two black sockets) both have 1024MB DIMMs installed, the system will
operate in dual channel mode. If this system had two additional DIMMs added into the white sockets,
they could be a pair of 256MB, 512MB, or 1024MB DIMMs and the system would still operate in
dual channel mode. For purposes of “like sizes,” a single-sided 512MB DIMM and a double-sided
512MB DIMM would not be the same size because they have different numbers of memory chips
on them.
●
The system will operate in single channel mode if the DIMMs are populated in any other supported
configuration. Supported configurations consist of any combination of one, two, three, or four DIMMs
as long as socket XMM3 is populated before socket XMM1 in Channel A, and socket XMM4 is
populated before socket XMM2 in Channel B.
166 Appendix F Memory ENWW
- HP xw3400 Workstation 1
- About This Book 3
- Table of contents 5
- Install the operating system 11
- Creating a disc recovery set 12
- Computer Setup (F10) utility 13
- Computer Setup—File 15
- Computer Setup—Storage 16
- Computer Setup—Security 19
- Computer Setup—Power 21
- Computer Setup—Advanced 22
- HP Insight Diagnostics 25
- Survey tab 26
- Test tab 26
- Status tab 27
- Help tab 28
- Protecting the software 29
- Restoring the software 29
- Desktop management 31
- HP OpenView Agent 32
- Remote system installation 34
- HP System Software Manager 35
- HP Client Manager 35
- HP Client Foundation Suite 37
- ROM Flash 38
- Remote ROM Flash 39
- HPQFlash 39
- Replicating the setup 40
- Creating a bootable device 41
- Dual-State power button 44
- HP web site support 45
- Industry standards 45
- Asset tracking and security 45
- Password security 47
- Entering a power-on password 48
- Entering a Setup password 48
- Clearing passwords 50
- DriveLock 51
- Smart Cover Sensor 53
- Smart Cover Lock 53
- Cable Lock provision 54
- Drive protection system 55
- Surge-tolerant power supply 55
- Thermal sensor 55
- Serial and Parallel ATA drive 57
- SATA hard drive cables 58
- PATA device information 59
- ATA SMART Drives 59
- Hard drive capacities 59
- Identifying routine care and 61
- Generating static 62
- Grounding the work area 63
- Operating guidelines 65
- Routine care 65
- Cleaning the monitor 66
- Cleaning the keyboard 66
- Service considerations 67
- Cables and connectors 68
- Hard drives 68
- Lithium coin cell battery 68
- Removal and replacement 69
- External security devices 70
- Access panel 71
- Front bezel 72
- Front drive bezels 73
- Cable management 74
- Cable connections 75
- Expansion cards 77
- Drive positions 84
- Removing an external drive 84
- Disconnecting optical cables 85
- Installing an external drive 86
- Chassis fan 93
- Fan shroud 94
- Heatsink 96
- Processor 97
- Power supply 100
- System board 101
- Type 1 Battery Holder 103
- Type 2 Battery Holder 103
- Type 3 Battery Holder 104
- Connector pin assignments 105
- Ethernet RJ-45 106
- Ethernet AUI 106
- Parallel interface 107
- Microphone 108
- Headphone 108
- Line-in audio 108
- Line-out audio 108
- External infrared transceiver 109
- 24-Pin Power 110
- 4-Pin Power (for CPU) 111
- SATA data and power 111
- PCI Express 111
- DVI connector 113
- Power cord set requirements 115
- POST error messages 117
- Safety and comfort 129
- Helpful hints 130
- Solving general problems 132
- Solving power problems 136
- Solving diskette problems 137
- Solving hard drive problems 140
- Solving display problems 144
- Solving audio problems 148
- Solving printer problems 150
- Solving network problems 155
- Solving memory problems 158
- Solving processor problems 160
- Cause Solution 163
- Solving drive key problems 164
- Solving software problems 168
- System board and riser board 169
- ENWW 161 171
- ENWW 163 173
- Secondary NIC clock crystal 174
- RTC clock crystal/tie-down 174
- DDR2-SDRAM DIMMs 175
- Populating DIMM sockets 176
- 168 Appendix F Memory ENWW 178
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