HP DL585 - Page 45

Hardware options installation 45
• For optimal performance, install equal amounts of memory for both processors.
• For best performance, install all memory modules of the same speed on the same processor.
• For best power, install all memory modules of the same voltage on the same processor.
Memory bus speed
Depending on the quantity and native speed of the memory modules installed, memory bus speeds can be
1333 MHz, 1066 MHz, 800 MHz, or 667 MHz. Memory bus speeds can be different for each
processor.
To determine memory bus speeds:
1. Within RBSU, select the Power Management Options menu > Advanced Power Management Options
menu > Maximum Memory Bus Frequency menu.
2. Select one of the following menu options:
o Auto (default)—The memory bus speed is set to what is shown in the following table. If the native
speed of the installed memory module is slower than the memory bus speed, the memory bus
speed is set to the memory module native speed.
Memory
modules per
channel
QR SR or DR Memory
module native
speed
Memory bus speed
(standard-voltage
memory module)
Memory bus speed
(low-voltage memory
module)
1 — 1 SR 1333 MHz
DR 1333 MHz
DR 1066 MHz
1333 MHz 1333 MHz
1 1 — QR 1066 MHz 1066 MHz 1066 MHz
2 — 2 SR 1333 MHz
DR 1333 MHz
DR 1066 MHz
1333 MHz 1333 MHz
2 1 1 SR 1333 MHz
DR 1333 MHz
DR 1066 MHz
QR 1066 MHz
800 MHz 800 MHz
3 — 3 SR SR 1333 MHz 1066 MHz 1066 MHz
3 — 3 DR DR 1333 MHz
DR 1066 MHz
1066 MHz 800 MHz
3 — 3 mixed SR 1333 MHz
DR 1333 MHz
DR 1066 MHz
1066 MHz 800 MHz
3 1 2 SR 1333 MHz
DR 1333 MHz
DR 1066 MHz
QR 1066 MHz
800 MHz 667 MHz
o 800 MHz—The memory bus speed is set to 800 MHz regardless of the quantity of memory
modules installed, unless the table above reflects a slower memory bus speed.