DELL™ OPTIPLEX™ 990 TECHNICAL GUIDEBOOK —VERSION 1.423AU DIOCO MM UNI CA TIO NS - NE TW OR K A DAP TE R ( NI C)NOTE: MT supports full height (FH) cards and DT and SFF supports low profile (LP) cards.INTEGRATED REALTEK ALC269Q HIGH DEFINITION AUDIO MT DT SFF USFFHigh Definition Stereo support X X X XNumber of channels 2Number of Bits / Audio resolution 16, 20, and 24-bit resolutionSampling rate (recording/playback) Support 44.1K/48K/96K/192 kHz sample ratesSignal to Noise Ratio 98 dB DAC outputs, 90 dB for ADC inputsAnalog Audio X X X XDolby DigitalTHXDigital out (S/PDIF)Audio Jack ImpedanceMicrophone 40K ohm~60K ohmLine-In 40K ohm~60K ohmLine-Out 100~150 ohmHeadphone 1~4 ohmInternal Speaker Power Rating 2Watt (peak) / 1Watt (average)INTEGRATED INTEL® 82579 GIGABIT1ETHERNET LAN 10/100/1000 MT DT SFF USFFExternal Connector Type RJ45Data Rates supported 10/100/1000 MbpsController DetailsController bus architecture PCIe-based interface for S0 state, SMBus for Sxlow power stateIntegrated memory N/AData transfer mode (example Bus-Master DMA) N/APower consumption (full operation per data rate connection speed) 711mW (Max.)Power consumption (standby operation) 227mW (Max.)IEEE standards compliance (example 802.1P) 802.3Hardware Certifications (example FCC, B, GS mark…) N/ABoot ROM Support EEPROM (located in SPI)Network Transfer Mode (example Full Duplex, Half Duplex)Network Transfer Rate (example 10BASE-T (half-duplex) 10 Mbps10BASE-T (full-duplex) 20 Mbps100BASE-TX (half-duplex) 100 Mbps100BASE-TX (full-duplex) 200 Mbps1000BASE-T (full-duplex) 2000 Mbps10 Mb (full/half-duplex)100 Mb (full/half-duplex)1000 Mb (full-duplex)