Memory Board - Intel SR4850HW4 - Server Platform - 0 MB RAM Product Manual

Memory Board

Up to four memory boards can be installed. Each memory board has four DIMM sockets that
support two DDR2 channels with two DIMMs per channel. The memory boards support both
single-rank and double-rank registered DIMMs. Unbuffered DIMMs are not supported. The
memory boards connect to the main board through x16 PCI-Express* connectors.
The Independent Memory Interface (IMI) bus connects the Intel® E8501 eXtended Memory Bridge
on the memory board and the Intel® E8501 chipset North Bridge on the main board. The I
also goes through the memory connector linking the FRU device on the memory board to the server
management (SM) bus on the main board.
The Hot-plug memory boards have LEDs indicating the configuration and status of the DIMMs on
the Hot-plug memory board. See the following diagram.
B
A
C
Item Feature
A Mirror
Configuration
(green)
B RAID Configuration
(green)
C Hot-plug Attention
LED (amber)
D Attention Button
E Power LED (green)
F DIMM 1B Status
LED (amber)
DIMM 1A Status
G
LED (amber)
H DIMM 2B Status
LED (amber)
Intel® Server Platforms SR4850HW4 & SR4850HW4/M Product Guide
D
E
Description
LED on: The server is in Memory Mirror configuration. This memory board
mirrors another memory board in the system.
LED off: The server is not configured for Memory Mirror
LED on: The server is in RAID Memory configuration.
LED off: server is not in a RAID configuration.
LED off: Normal operation.
LED on: Memory Hot-plug plug transition event.
Press this button to perform a hot-insertion or hot-removal of a memory board.
LED on: Power is detected. The memory board is powered on.
LED off: Power is not detected on all boards.
LED flashing: The memory board is in a Hot-plug event.
LED on: Error LED for DIMM slot 1B (J3A1). The DIMM is malfunctioning and
needs to be replaced.
LED off: The DIMM is functioning properly.
LED on: Error LED for DIMM slot 1A (J3A2). The DIMM is malfunctioning and
needs to be replaced.
LED off: The DIMM is functioning properly.
LED on: Error LED for DIMM slot 2B (J3B1). The DIMM is malfunctioning and
needs to be replaced.
LED off: The DIMM is functioning properly.
2
C bus
G I
F H
TP01412
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