Dell XPS 730x (Early 2009) - Manual (Page 4)

Technical Overview: Dell XPS 730/730X Service Manual
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Dell XPS 730X
1 CPU socket 2 system board CPU fan header
3 DIMMs 1, 3, and 5 4 ATX power connector (ATX_PWR)
5 IDE connector (IDE) 6 SATA port 4 (SATA 4)
7 battery socket 8 SATA ports 1-3 (SATA 1-3)
9 internal USB header 1 (USB) 10 internal USB header 2 (USB)
11 internal USB header 3 (USB) 12 1394 header
13 PCI slot 1 (PCI SLOT 1) 14 front panel audio header (FP Audio)
15 PCIe slot 5 (PCI_E5) 16 PCIe slot 4 (PCI_E4)
17 PCIe slot 3 (PCI_E3) 18 PCIe slot 2 (PCI_E2)
19 PCIe slot 1 (PCI_E1) 20 CPU power header
Master Control Board