Dell OptiPlex 755 User's Guide - Page 176
SATA: 1.5 Gbps and 3.0 Gbps - sata controller speed
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Video Type Audio Type Stereo conversion Controllers Drives Expansion Bus Bus type Bus speed Cards: PCI: connector connector size connector data width (maximum) PCI Express: connector power connector size connector data width (maximum) • Intel Graphics Media Accelerator 3100 (integrated on system board) • PCI Express x16 slot can support either a PCI Express graphics card or a DVI graphics card (for dual-monitor support) ADI 1984 High Definition Audio 24-bit analog-to-digital; 24-bit digital-to-analog two SATA controllers and one eSATA controller supporting one device each PCI 2.3 PCI Express 1.0A SATA 1.0A and 2.0 USB 2.0 PCI: 133 MBs PCI Express x16: 8 GB/s bidirectional speed SATA: 1.5 Gbps and 3.0 Gbps USB: 480 Mbps low-profile cards supported one 120 pins 32 bits one x16 25 W (maximum) 164 pins (x16) 16 PCI Express lanes (x16) 176 Small Form Factor Computer Specifications