
17
Chapter 1: Introduction
Figure 1-6. Intel C621 Chipset: System Block Diagram
Note:
This is a general block diagram and may not exactly represent the features on your
motherboard. See the System Specifications appendix for the actual specifications of your
motherboard.
Mellanox
MT27712
25G SFP28 x2
(Optional)
SPI
LAN3
Debug Card
RGMII
FRONT PANEL
CTRL
SYSTEM POWER
FAN SPEED
PCI-E X1 G2
USB 2.0
#7
PCH
6.0 Gb/S
#1~12
SAT
A
RTL8211E-VB-CG
RJ45
ESPI
LBG-1G X1 UPLINK (15W)
SPI
Temp Sensor
NCT7718W
TPM HEADER
USB 2/3.0
USB
3
SPI
BIOS
BMC
AST2500
#5
COM1
Connector
VGA
Connector
BMC ROM
DDR4
PCI-E X8 G3
#1
#2
SFP28
SFP28
RMII/NCSI
RMII/NCSI
#10
#0~3
Hybrid M.2 SSD
eSPI
DDR4 DIM
M
#1
#1
#1
DDR4 DIM
M
#1
DDR4 DIM
M
#1
DDR4 DIM
M
#1
#2
B
C
E
F
D
H
J
G
#1
#1
L
M
DDR4 DIM
M
#1
#2
DDR4 DIM
M
DDR4 DIM
M
UPI0
DDR4 DIM
M
UPI1
UPI0
UPI1
UPI2
UPI2
A
DDR4 DIM
M
#1
#1
#2
DDR4 DIM
M
DDR4 DIM
M
DDR4 DIM
M
#1
#2
K
BIOS
UPI 10.4G/11.2G T/s
Hybrid M.2 SSD
PCI-E X4 G3
DMI
RMII/NCSI
#1-2
USB 2.0
USB
2
#1
#2
#3-4
Cable
PCI-E X1
6
#3
#2
#1
PCI-E X16 G3
SXB1, SXB
2
PCI-E X16 G3
NVMEx
4
PCI-E X16 G3
Cable
PCI-E X16 G3
PCI-E X16 G3
PCI-E X1
6
PCI-E X
8
PCI-E X8 G3
#2 #3B
#1
#3A DMI
AIOM
Header
Rear IO
PCI-E X1 G3
#4
SATA G3
SATA G3
SLOT6 SLOT9
SLOT5
CPU1
CPU2