HP Dc7900 Service Reference Guide: HP Compaq dc7900 Business PC - Page 289
SPI ROM and socket XU19 = socket, U19 = SPI ROM, System ROM and Socket Socket = XU15, ROM = U15
UPC - 884962028483
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U2 U3 U4 U5 U6 U7 U10 U11 U12 U13 U14 U16 U17 U18 U19 U20 U21 U29 U30 U31 U32 U40 U46 U50 U51 U52 U53 XBT XMM1 XMM2 - XMM5 XU1 XU2 XU15/U15 XU19/U19 Single chip solution (combined northbridge/southbridge) North bridge South bridge Super I/O Clock chip 64 bit Bridge NIC Chip NIC SPI ROM LOM1 PHY Audio Codec Audio internal speaker amplifier LOM2 LOM2 EEPROM LOM2 PHY SPI ROM - SOIC-8 footprint Fan controller SPI ROM - SO16 footprint TMDS controller Parallel port diode array First serial port transceiver Second serial port transceiver TPM controller VRD controller USB front port power switch First USB rear port power switch Second USB rear port power switch Third USB rear port power switch Battery socket Memory slot Following memory slots Processor socket Secondary processor socket System ROM and Socket (Socket = XU15, ROM = U15) SPI ROM and socket (XU19 = socket, U19 = SPI ROM) 277