HP EliteDesk 800 35W G3 Hardware Reference Guide - Page 22

Populating memory module slots

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Populating memory module slots There are two memory module slots on the system board, with one slot per channel. The sockets are labeled DIMM1 and DIMM3. The DIMM1 slot operates in memory channel B. The DIMM3 slot operates in memory channel A. Item 1 2 Description Memory module slot, Channel B Memory module slot, Channel A System Board Label DIMM1 DIMM3 Slot Color Black Black The system will automatically operate in single-channel mode, dual-channel mode, or flex mode, depending on how the memory modules are installed. ● The system will operate in single-channel mode if the memory module slots are populated in one channel only. ● The system will operate in a higher-performing dual-channel mode if the memory capacity of the memory module in Channel A is equal to the memory capacity of the memory module in Channel B. ● The system will operate in flex mode if the memory capacity of the memory module in Channel A is not equal to the memory capacity of the memory module 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 memory module in the system. 16 Chapter 3 Hardware upgrades

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Populating memory module slots
There are two memory module slots on the system board, with one slot per channel. The sockets are labeled
DIMM1 and DIMM3. The DIMM1 slot operates in memory channel B. The DIMM3 slot operates in memory
channel A.
Item
Description
System Board Label
Slot Color
1
Memory module slot, Channel B
DIMM1
Black
2
Memory module slot, Channel A
DIMM3
Black
The system will automatically operate in single-channel mode, dual-channel mode, or flex mode, depending
on how the memory modules are installed.
●
The system will operate in single-channel mode if the memory module slots are populated in one
channel only.
●
The system will operate in a higher-performing dual-channel mode if the memory capacity of the
memory module in Channel A is equal to the memory capacity of the memory module in Channel B.
●
The system will operate in flex mode if the memory capacity of the memory module in Channel A is not
equal to the memory capacity of the memory module 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 memory module in the
system.
16
Chapter 3
Hardware upgrades