Dell Precision 490 Desktop User's Guide - Page 93

Expansion Bus Bus type Bus speed Card Slots PCI connector connector size connector data width (maximum) PCI-X connectors connector size connector data width (maximum) PCI Express x8 (wired as x4) connectors connector size connector data width (maximum) PCI Express x16 connector connector size connector data width (maximum) Drives Externally accessible: Internally accessible: Connectors External connectors: Serial Parallel IEEE 1394 (optional) Network adapter PS/2 (keyboard and mouse) USB Audio System board connectors: IDE drive Floppy drive Serial ATA Internal USB PCI 2.3 PCI Express 1.0A PCI-X 2.0A USB 2.0 PCI: 133 MB/s PCI-X: 800 MB/s PCI Express: x4/ x8 slot bidirectional speed - 2 GB/s x16 slot bidirectional speed - 8 GB/s Desktop Mode: Slots 2-4 support full-length cards (1 PCI Express x16 slot, one PCI Express x8 slot, and one PCI slot), and slots 1, 5, and 6 support halflength cards (2 PCI-X slots and 1 PCI Express x8 slot). Tower Mode: Slots 2-5 support full-length cards (1 PCI-X slot, one PCI Express x8 slot, 1 PCI Express x16 slot, and one PCI slot), and slots 1 and 6 support half-length cards (1 PCI-X slot and 1 PCI Express x8 slot). one 120 pins 32 bits two 188 pins 64 bits two x8 (support x8, x4, and x1 modes/cards; maximum x4 link width) 98 pins 4 PCI Express lanes one x16 slot (supports x16, x8, x4 and x1 modes/cards) 164 pins 16 PCI Express lanes one 3.5-inch drive bay (FlexBay) two 5.25-inch drive bays two 3.5-inch hard-drive bays two 9-pin connectors; 16550C-compatible 25-hole connector (bidirectional) one front-panel 6-pin connector (with optional card) RJ45 connector two 6-pin mini-DIN two front-panel and five back-panel USB 2.0- compliant connectors two front-panel connectors for microphone and headphones; two back-panel connectors for line-in and line-out/ headphones 40-pin connector 34-pin connector five 7-pin connectors 10-pin connector for optional Media Card Reader (3.5inch bay device)