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HP Z420 Workstation system board components
Figure 1-14 System board component locations
Table 1-12 System board component descriptions
I/O SATA (SAS optional) Cooling Security
1 Front 1394a 14 AHCI 3Gb/s 25 CPU0 fan 34 Chassis solenoid lock
2 Front audio 15 AHCI 6Gb/s 26 Front fan 35 Chassis intrusion sensor
3 Front speaker 16 HDD LED 27 Memory fan Service
4 Front USB 2.0 17 SCU 3Gb/s 28 Rear fan 36 Clear CMOS button
5 Front USB 3.0 18 SAS (optional) Power 37 ME/AMT flash override
6 Internal USB 2.0 PCI/PCIe 29 Battery 38 Password jumper
7 Keyboard/mouse 19 PCIe2 x4 (1) 30 Front power button/LED
8 Network 20 PCIe3 x16 31 Main power
9 Rear 1394a 21 PCIe2 x8 (4) 32 CPU/MEM power
10 Rear audio 22 PCIe3 x8 33 Rear power button/LED
11 Rear USB 2.0 23 PCIe3 x16 For related expansion card slot information, see
Expansion
slots on page 84
12 Rear USB 3.0 24 PCI 32/33
13 Serial (optional)
HP Z420 Workstation components
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