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Low profile expansion slots include (1) PCI slot, (1) PCI Express x1 slots and (2) PCI Express x16 graphics slot NOTE: NOTE:NOTE:NOTE:NOTE: 2nd PCIe x16 slot has x4 connectivity. 3. Front I/O includes (4) USB 2.0 ports, dedicated headphone output, and a microphone/headphone jack 4. HP Optical Mouse 5. HP Keyboard 6. 3.5” external drive bay supporting a media card reader or a secondary hard disk drive 7. 5.25” external drive bay supporting an optical disk drive 8. 3.5” internal drive bay supporti