ASRock B250M Pro4 User Manual - Page 27
Platform Module TPM system
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ATX Power Connector (24-pin ATXPWR1) (see p.7, No. 7) ATX 12V Power Connector (8-pin ATX12V1) (see p.7, No. 1) Serial Port Header (9-pin COM1) (see p.7, No. 23) 12 24 1 13 8 5 4 1 This motherboard provides a 24-pin ATX power connector. To use a 20-pin ATX power supply, please plug it along Pin 1 and Pin 13. 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. This COM1 header supports a serial port module. GN D +3VS B LAD0 +3V LAD3 PCIRST # FRAM E PCICLK GN D English TPM Header (17-pin TPMS1) (see p.7, No. 21) GND SERIRQ # S_PWRDWN # GN D LAD1 LAD2 SMB_DATA_MAIN SMB_CLK_MAIN This connector supports Trusted Platform Module (TPM) system, 1 which can securely store keys, digital certificates, passwords, and data. A TPM system also helps enhance network security, protects digital identities, and ensures platform integrity. Print Port Header (25-pin LPT1) (see p.7, No. 22) AFD# ERROR# PINIT# SLIN# GND 1 SPD7 SPD6 ACK# SPD5 BUSY SPD4 PE SPD3 SLCT SPD2 SPD1 SPD0 STB# This is an interface for print port cable that allows convenient connection of printer devices. 22