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ATX 12V Power
Connectors
(8-pin ATX12V1)
(see p.1, No. 3)
(8-pin ATX12V2)
(see p.1, No. 4)
SPI TPM Header
(13-pin SPI_TPM_J1)
(see p.1, No. 21)
Thunderbolt AIC
Connector
(5-pin TB1)
(see p.1, No. 32)
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
1
X299 Steel Legend
This motherboard
provides two 8-pin ATX
12V power connectors. 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.
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.
Please connect a Thunderbolt™
add-in card (AIC) to this
connector via the GPIO cable.
*Please install the Thunderbolt™
AIC card to PCIE3.
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