HP Workstation x4000 hp workstation x4000 - Technical Reference manual - Windo - Page 159

System Memory, Upgrading Memory on the 8-RIMM MEC, Bank I includes sockets 1B J1, 2B J2, 1A J5

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NOTE NOTE Installing or Replacing Parts and Accessories System Memory System Memory Use only HP RIMMs specifically designed for your Workstation model. To find out about available accessories for your Workstation, go to www.hp.com/workstations/support. Upgrading Memory on the 8-RIMM MEC The memory for the HP x4000 Workstation is located on a Memory Expander Card (shown in Figure 10-9 on page 158), which plugs into the system board. There are two memory banks (RDRAM channels): • Bank I includes sockets 1B (J1), 2B (J2), 1A (J5), and 2A (J6). • Bank II includes sockets 3B (J3), 4B (J4), 3A (J7), and 4A (J8). This allows for a total of 8 RIMMs. You must adhere to the following rules when loading memory: • RIMMs must be loaded in matched pairs. Matching RIMMs have the same RDRAM size, speed and Mbit technology. • Each RDRAM bank (channel) must be either completely empty or completely filled as shown in Figure 10-10. Therefore, if only one pair of RIMMs is installed in a bank, then the remaining sockets in the bank must contain continuity modules (CRIMMs) to ensure continuity. All Workstations (unless they already have 8 RIMMs) ship with a pair of CRIMMs in case they are needed in future memory configurations. CRIMMS may be stored in an unused memory bank. Chapter 10 157

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Installing or Replacing Parts and Accessories
System Memory
Chapter 10
157
System Memory
NOTE
Use only HP RIMMs specifically designed for your Workstation model. To
find out about available accessories for your Workstation, go to
www.hp.com/workstations/support.
Upgrading Memory on the 8-RIMM MEC
The memory for the HP x4000 Workstation is located on a Memory
Expander Card (shown in Figure 10-9 on page 158), which plugs into the
system board.
There are two memory banks (RDRAM channels):
•
Bank I includes sockets 1B (J1), 2B (J2), 1A (J5), and 2A (J6).
•
Bank II includes sockets 3B (J3), 4B (J4), 3A (J7), and 4A (J8).
This allows for a total of 8 RIMMs.
You must adhere to the following rules when loading memory:
•
RIMMs must be loaded in
matched pairs
. Matching RIMMs have the
same RDRAM size, speed and Mbit technology.
•
Each RDRAM bank (channel) must be either completely empty or
completely filled as shown in Figure 10-10. Therefore, if only one pair
of RIMMs is installed in a bank, then the remaining sockets in the
bank must contain continuity modules (CRIMMs) to ensure
continuity.
NOTE
All Workstations (unless they already have 8 RIMMs) ship with a pair of
CRIMMs in case they are needed in future memory configurations.
CRIMMS may be stored in an unused memory bank.