HP 400 G1 Spécifications télécharger pdf (Page 108)

Populating DIMM sockets

There are two DIMM sockets on the system board, with one socket per channel. The sockets are labeled

DIMM1 and DIMM3. Socket DIMM1 operates in memory channel B. Socket DIMM3 operates in

memory channel A.

The system will automatically operate in single channel mode, dual channel mode, or flex mode,

depending on how the DIMMs are installed.

NOTE: Single channel and unbalanced dual channel memory configurations will result in inferior

graphics performance.

●

The system will operate in single channel mode if the DIMM sockets are populated in one channel

only.

●

The system will operate in a higher-performing dual channel mode if the memory capacity of the

DIMM in Channel A is equal to the memory capacity of the DIMM in Channel B.

●

The system will operate in flex mode if the memory capacity of the DIMM in Channel A is not

equal to the memory capacity of the DIMM in Channel B. In flex mode, the channel populated

with the least amount of memory describes the total amount of memory assigned to dual channel

and the remainder is assigned to single channel. If one channel will have more memory than the

other, the larger amount should be assigned to Channel A.

●

In any mode, the maximum operational speed is determined by the slowest DIMM in the system.

Installing DIMMs

CAUTION: You must disconnect the power cord and wait approximately 30 seconds for the power

to drain before adding or removing memory modules. Regardless of the power-on state, voltage is

always supplied to the memory modules as long as the computer is plugged into an active AC outlet.

Adding or removing memory modules while voltage is present may cause irreparable damage to the

memory modules or system board.

The memory module sockets have gold-plated metal contacts. When upgrading the memory, it is

important to use memory modules with gold-plated metal contacts to prevent corrosion and/or

oxidation resulting from having incompatible metals in contact with each other.

Static electricity can damage the electronic components of the computer or optional cards. Before

beginning these procedures, ensure that you are discharged of static electricity by briefly touching a

grounded metal object.

When handling a memory module, be careful not to touch any of the contacts. Doing so may damage

the module.

1. Prepare the computer for disassembly (Preparation for disassembly on page 92).

2. Remove the access panel (

Access panel on page 93).

3. Rotate up the internal drive bay housing to access the memory module sockets on the system

board.

98 Chapter 6 Removal and replacement procedures: Small Form Factor

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HP 400 G1 Spécifications Page 108