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ATX 12V Power
Connector
(8-pin ATX12V1)
(see p.1, No. 1)
ATX 12V Power
Connector
(4-pin ATX12V2)
(see p.1, No. 2)
SPI TPM Header
(13-pin SPI_TPM_J1)
(see p.1, No. 22)
8
5
4
1
SPI_DQ3
+3.3V
Dummy
CLK
SPI_MOSI
RST#
TPM_PIRQ
1
SPI_TPM_CS#
GND
RSMRST#
SPI_MISO
SPI_CS0
SPI_DQ2
B550M Steel Legend
This motherboard
provides an 8-pin ATX
12V power connector. To
use a 4-pin ATX power
supply, please plug it along
Pin 1 and Pin 5.
*Warning: Please make
sure that the power cable
connected is for the CPU
and not the graphics
card. Do not plug the
PCIe power cable to this
connector.
Please connect an ATX
12V power supply to this
connector.
*Connecting an ATX
12V 4-pin cable here is
optional .
*The power supply plug
fits into this connector in
only one orientation.
This connector supports SPI
Trusted Platform Module (TPM)
system, which can securely store
keys, digital certificates, pass-
words, and data. A TPM system
also helps enhance network
security, protects digital
identities, and ensures platform
integrity.
31
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