Sun Fire X4800 Server CPU Module (CMOD) and Filler Module Overview

The CPU modules (CMODs) are the processing engines for the Sun Fire X4800 server. Each CMOD contains two processors (CPUs), memory, and I/O capabilities for PCIe and GigabitEthernet.

The CMOD bay of the Sun Fire X4800 server can contain up to four CMODs. The server supports two configurations, a two-module configuration and a fully loaded four-module configuration. In both configurations, CMOD 0 (BL 0) is the master CMOD. In the two-module configuration, a filler module must be used for slots that do not contain a CMOD. CMODs and filler modules have a lever mechanism that is used for removal and installation. The lever is held in place by a release latch.

Note - CMODs and CPU filler modules are designated as customer-replaceable units (CRU).

image:An illustration of the CPU module.

1	CPU modules (CMODs)
2	Lever release latch

image:An illustration showing the internal CPU module components

Component		Link
1	32 DIMM slots. Support for up to 32 DDR3-1066 MHz RDIMM (16 per CPU)	DIMM Overview
2	SAS-2 RAID Expansion module (REM-one per system)	RAID Expansion Module Overview
3	Fabric Expansion module (FEM-one per CMOD)	Fabric Expansion Module Overview
4	System battery	How to Replace the CMOD Battery (CRU)
5	Heat sinks (2)	CPU and Heatsink Assembly Overview
6	Internal USB (partially obstructed)	Internal USB Port Overview
7	Two Intel Xeon X75xx CPU sockets (up to 130W TDP SKU per CPU)	CPU and Heatsink Assembly Overview

CMOD Connectivity
USB connectivity: One internal USB port for flash memory stick (connects to server storage fabric) One through the server midplane to SP module KVM
PCIe connectivity: Interconnect to two 8x PCIe (2.0) Express modules (PCIe EM) Interconnect to PCIe (2.0) Network Express module (NEM) with two on-board 10 GbE 10/100/1000BaseT ports
GigabitEthernet connectivity: Interconnect to Network Express module (NEM) with four GigabitEthernet ports

See also:

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	Sun Fire X4800 Server Service Manual