20 PRODUCT OVERVIEW
Power Supply and Cooling
The workstation has 8 outputs:
+3.3V—used with PCI, MCH, ICH5, PXH, LAN, SATA hard drives, and on-board logic
+5V—used with storage (disk, optical, diskette), PCI, Audio, USB, and on-board logic
+12V-A—used with PCI, fans, input to onboard regulators that supply 1.2V, 1.5V, and 1.8V
+12V-B—used with storage (disk, optical, floppy), PCI Express x16 auxiliary connector
+12VCPU0—input to onboard regulator that supplies power for CPU0
+12VCPU1—input to onboard regulator that supplies power for CPU1
-12V—used by PCI
5VSB—used for sleep circuitry
Table 1-5 Power Supply and Cooling (Voltage)
Voltage Minimum Maximum
3.3 V 3.17 V 3.47 V
5 V 4.85 V 5.25 V
12 VCPU0 11.52 V 12.6 V
12 VCPU1 11.52 V 12.6 V
12 V-A 11.52 V 12.6 V
12 V-B 11.52 V 12.6 V
V12N -11.4 V -12.6 V
5 VSB 4.85 V 5.25 V
Table 1-6 Power Supply and Cooling (Current)
Current Minimum Operating Continuous Maximum
3.3 V 0 A 3.1 A 23 A 31.0 A
5 V 0 A 2.3 A 18 A 23.0 A
12 VCPU0 0 A 3.1 A 11.4 A 13.7 A
12 VCPU1 0 A 0 A 11.4 A 13.7 A
12 V-A 0 A 0 A 13.7 A 17.0 A
12 V-B 0 A 0 A 13.7 A 14.0 A
V12N 0 A 0 A 0.5 A 0.8 A