HP Workstation x4000 hp workstation x4000 - Technical Reference manual - Windo - Page 84

Power Specifications, Controller Hub, the P64H, and the MEC. It is

Page 84 highlights

Table 6-1 Power Specifications Power Delivery Power Signal Description Supply 5 V Standby VCC_CORE 1.5 V 1.8 V 2.5 V Description Supplies power to: • Diag LEDs • Network activity LED • Hard disk drive activity LED • Power LED • Local Area Network (LAN) connector • Universal Serial Bus (USB) connector • PS2KB • Winbond WB782D hardware monitoring ASIC • 3.3 VSB • SB1_8V The exact processor voltage is determined by VID bits from the processor(s). In a dual-processor system, the processors share a power plane. A single VCC_CORE is generated by a +12 VDIG to VCC_CORE dc-to-dc converter that is placed on the system board. This is called VR down. The maximum current each processor can draw is 57 A. This 1.5 V supply is generated from a three terminal regulator on the system board. The current is limited to 5 A. This supply is used for the Intel 860 Memory Controller Hub, the P64H, and the MEC. It is generated by a switching dc-to-dc converter. the output voltage is 1.8 V and the output current is limited to 15 A. A separate 1.8 V power supply is used for the ICH2. This 1.8 V supply is generated from a three terminal linear regulator which limits the output current to 1 A. This supply is generated by a voltage regulator on the Memory Expander Card (MEC). 84 Chapter 6

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
  • 217
  • 218
  • 219
  • 220
  • 221
  • 222
  • 223
  • 224
  • 225
  • 226
  • 227
  • 228
  • 229
  • 230
  • 231
  • 232
  • 233
  • 234
  • 235
  • 236
  • 237
  • 238

Power Specifications
Power Delivery
Chapter 6
84
5 V Standby
Supplies power to:
Diag LEDs
Network activity LED
Hard disk drive activity LED
Power LED
Local Area Network (LAN) connector
Universal Serial Bus (USB) connector
PS2KB
Winbond WB782D hardware monitoring ASIC
3.3 VSB
SB1_8V
VCC_CORE
The exact processor voltage is determined by VID
bits from the processor(s).
In a dual-processor system, the processors share a
power plane. A single VCC_CORE is generated by a
+12 VDIG to VCC_CORE dc-to-dc converter that is
placed on the system board. This is called VR down.
The maximum current each processor can draw is
57 A.
1.5 V
This 1.5 V supply is generated from a three terminal
regulator on the system board. The current is limited
to 5 A.
1.8 V
This supply is used for the Intel 860 Memory
Controller Hub, the P64H, and the MEC. It is
generated by a switching dc-to-dc converter. the
output voltage is 1.8 V and the output current is
limited to 15 A.
A separate 1.8 V power supply is used for the ICH2.
This 1.8 V supply is generated from a three terminal
linear regulator which limits the output current to
1 A.
2.5 V
This supply is generated by a voltage regulator on
the Memory Expander Card (MEC).
Table 6-1
Power Signal Description
Supply
Description