HP 79XXY, 89XXY manual Installing a Memory Module

3RIMMs work in identical pairs, so they must be from the same vendor, have the same speed, and memory size density within each channel (see the memory table).

3When C-RIMMs are used to fill empty sockets, they must be placed in the RIMM A2 and RIMM B2 sockets. The RIMMs must be inserted in the RIMM A1 and RIMM B1 sockets.

The following table illustrates the initial combinations of RIMMs you can use and the insertion sequence.

	Channel 1		Channel 2
Total	RIMM A1	RIMM A2	RIMM B1	RIMM B2
Memory	socket	socket	socket	socket
128 MB	64 MB	C-RIMM	64 MB	C-RIMM
	RIMM		RIMM
256 MB	64 MB	64 MB	64 MB	64 MB
	RIMM	RIMM	RIMM	RIMM
256 MB	128 MB	C-RIMM	128 MB	C-RIMM
	RIMM		RIMM
384 MB	128 MB	64 MB	128 MB	64 MB
	RIMM	RIMM	RIMM	RIMM
512 MB	128 MB	128 MB	128 MB	128 MB
	RIMM	RIMM	RIMM	RIMM
512 MB	256 MB	C-RIMM	256 MB	C-RIMM
	RIMM		RIMM

Installing a Memory Module		English
2	Disconnect the modem/phone cable.
1	Turn off the computer and all peripherals.
3	Disconnect the power cord and all other
	attached cables (such as the keyboard, mouse,
	and monitor).
4	Remove the side panel and the fan duct (see
	“Removing the Side Panel” on page 4 and
	“Removing the Fan Duct” on page 5).
5	Locate the memory sockets on the
	motherboard.

DIMM and	RIMM
DDR DIMM

Note: If all of the memory sockets are filled, you need to remove one of the memory modules (see “Removing a Memory Module” on page 11).

6Move any cabling out of the way, if necessary.

upgrading and servicing the pc 9