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Provides 5-Volt to 3.3-Volt signal level translation
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Support for a Zero Channel RAID (ZCR) card
The 3.3V/5V Segment B riser board contains voltage level translation converting the 5-Volt PCI
add-in card signals to conform to the server board, which has 3.3 Volt-signaling levels. The board
supports a limit of 25 Watts per slot. Figure 6 illustrates the Segment B riser board.
The 3.3-Volt Segment C low-profile riser board supports three 3.3-Volt 64-bit slots. The bus speed
varies from 33MHz to 100MHz depending on the type of PCI adapters configured in the 3.3-Volt
riser card. Figure 7 illustrates the 3.3-Volt Segment C low-profile riser board.
Figure 7. 3.3-Volt Segment C Low-Profile PCI Adapter Subsystem
The 3.3-Volt Segment C low-profile riser board supports ZCR cards. To operate correctly, insert
the ZCR card into the lower slot of the Segment C riser board, and then insert the Segment C riser
board into the low-profile riser board slot on the server board. For the location of the low-profile
riser board slot, see callout K on Figure 5.
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Figure 6. 3.3-Volt/5-Volt Segment B Full-Length Riser Board
TP00475
System Description
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