Optiplex Nx Computer's Expansion-Card Slot; Low-Profile Computer's Expansion-Card Slots; Figure 1-7. Riser Board For Net Pc Computer; Figure 1-8. Riser Board For The Low-Profile Computer - Dell OptiPlex GXa Service Manual

1-12 Dell OptiPlex GXa and OptiPlex NX Systems Service Manual

OptiPlex NX Computer's Expansion-Card Slot

The OptiPlex NX computer has one PCI expansion-card connector on the riser
board (see Figure 1-7). The computer automatically assigns any required mem-
ory space, IRQ lines, and DMA channels to an installed PCI expansion card
during system start-up. The Wakeup On LAN power connector on the riser
board supports an optional NIC expansion card with Wakeup On LAN capabil-
ity. The power LED lights up when DC power is applied to the riser board.
power LED
Wakeup On LAN
power connector

Figure 1-7. Riser Board for Net PC Computer

Low-Profile Computer's Expansion-Card Slots

The OptiPlex GXa low-profile computers have three expansion-card slots. The
riser board has two ISA expansion-card connectors and two PCI expansion-card
connectors. One PCI expansion-card connector and one ISA expansion-card
connector share a single expansion-card slot, resulting in a total of three
expansion-card slots (see Figure 1-8). The low-profile computers have a passive
riser board, with no PCI-to-PCI bridge. If you have an EM version of the low-
profile computer, the riser board includes the P1 connector (for connecting the
NIC to the riser cable) and an LED (see Figure 1-8). If the LED is on, the riser is
receiving power; if off, the riser is not receiving power.
HDLED
connector

Figure 1-8. Riser Board for the Low-Profile Computer

PCI1
connector
ISA2
connector
ISA1
connector
PCI2
connector
PCI1
connector