CHAPTER 2 Hardware Configuration
2.5 SB (System board)
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CA92344-0534-07
One MB is connected per the SMI2 interface, and converts SMI2 channel to dual system DDR4 channel.
A maximum of three DDR4 DIMMs can be connected to each DDR4 channel.
A maximum of 48 DIMM is supported in one SB. A maximum of 24 DIMMs are supported in one CPU
socket.
In PRIMEQUEST 2400E/2800E/2800B, the MB is a converter chip that is connected to the CPU and
memories.
One MB is connected per the SMI2 interface, and converts SMI2 channel to dual system DDR3 channel.
A maximum of three DDR3 DIMMs can be connected to each DDR3 channel.
A maximum of 48 DIMM is supported in one SB. A maximum of 24 DIMMs are supported in one CPU
socket.
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Memory Mezzanine
Memory Mezzanine is a memory expansion board on which two Memory Buffers and 12 DIMM slots are
mounted. Two Memory Mezzanines can be mounted for each SB.
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PCH
PCH is an LSI that controls the I/O of the legacy system and so on. It is connected to the CPU by a DMI
interface. It has a USB controller, APIC, RTC, LPC bus, and SPI bus controller. There are four USB
ports in the front as external connectors and one port as an internal connector. The USB outputs four
ports as external connectors in the front. Keyboard and mouse can be connected in the external
connector.
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BMC
BMC is an SB management LSI. It is connected to the LPC bus. It communicates with the MMB via the
BMC built-in NIC and exchanges information of the PECI bus (interface to the BIOS) and the GPIO
control.
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SPI Flash
SPI Flash is the abbreviation of the Serial Peripheral Interface Flash. It is a flash memory to store the
BIOS code (UEFI).
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TPM
TPM is a Trusted Platform Module (Option). Internally, it is connected to the LPC bus. Internally it has a
dedicated processor, and has a function to save the secret key. The TPM is used in the BitLocker drive
encryption function of Windows.
2.5.2 USB
The following figure is the USB system diagram.
FIGURE 2.18 system diagram
There are four external ports and two ports for BMC (for video redirection and virtualization media), from the
PCH mounted in the SB.
With the USB Disable function, the SB external port can be set to enable/disable.
For details on the USB Disable function setup, see ‘3.4.11 [USB Configuration] menu’ of the “
PRIMEQUEST
2000 Series Tool Reference
” (CA92344-0539).