Compaq ProLiant DL380 Setup And Installation Manual page 79

CAUTION: Processor slot 1 must be populated at all times. Failure to follow this
process will result in the system failing to boot and halting during the POST test.
This error will result in the system not functioning properly.
1. Install the processor in the vacant processor slot.
Figure 3-4. Sliding the processor into the processor socket
(riser board removed for clarity)
2. Slide the processor down into the slot until the tabs lock into the latches.
Figure 3-5. Locking the processor into the processor socket
(riser board removed for clarity)
Installing Hardware Options 3-5