17
Chapter 1: Introduction
Figure 1-5. 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.
SPI
LAN3
RGRMII
FRONT PANEL
CTRL
FAN SPEED
PCI-E X1
USB 2.0
#12 USB2.0
SFI
Intel PCH
6.0 Gb/S
USB 2.0
U
SB
RTL8211F
RJ45
ESPI
Temp Sensor
NCT7718W
USB 3.0
SPI
AST2500
BMC
#5
RMII/NCSI
COM1
Connector
VGA CONN
BMC Boot Flash
DDR4
5+1 PHASE
165W
21
33/2
666
21
33/2
666
DD
R
IV
P1
P1
P0
VR13
P0
DD
R
IV
D1
UPI
PCI-E X16
DMI3
JS
X
B2
PCI-E X8
A1
PCI-E X16
2
IM
D
2
IM
D
UPI
10.4/11.2G
5+1 PHASE
165W
VR13
SIOM
JS
X
B3
PCI-E X8
PCI-E x16
#1B #3
#2
#2B
B1
C1
VCCP1 12v
VCCP0 12v
UPI
2
#
U
P
C
1
#
U
P
C
1
3
:I
C
E
P
0
3
:
I
C
E
P
1
:
D
I
T
E
K
C
O
S
0
:
D
I
T
E
K
C
O
S
#1
SFI
U
P
LI
N
K
P
CI
-E
X8
LBG-1G 15W
LBG-4 w/ X8 UPLINK
4x 10G SFI
NO QuickAssist
19W
NCSI
Debug Card
TPM HEADER
BIOS
SW
SPI
SYSTEM POWER
E1
F1
G1
H1
J1
L1
M1
JS
X
B1
#2A
NCSI
master
N
V
M
E
#1
PCI-E X4 X4 X4 X4
N
V
M
E
#2
N
V
M
E
#3
N
V
M
E
#4
S-SATA x2
SATA
MINISAS-HD
I-SATA x8
6.0 Gb/S
#3
PCI-E X1
M.2
PCI-E X4
