Foxconn 915M03 Series Manual page 38

PCI Express Slots
PCI Express will offer the following design advantages over the PCI and AGP
interface:
-Compatible with existing PCI drivers and software and Operating Systems.
-High Bandwidth per Pin. Low overhead. Low latency.
-PCI Express supports a raw bit-rate of 2.5GB/s on the data pins. This re-
sults in a real bandwidth per pair of 250MB/s.
-A point to point connection, allows each device to have a dedicated connec-
tion without sharing bandwidth.
-Ability to comprehend different data structure.
-Low power consumption and power management features.
PCI Express will take two forms, x16 and x1 PCI Express slots. Whereas the x16
slot is reserved for graphic/video cards, the x1 slots are designed to accommo-
date less bandwidth-intensive cards, such as a modem or LAN card.
The difference in bandwidth between the x16 and x1 slots are notable to be
sure, with the x16 slot pushing 4 GB/sec (8 GB/sec concurrent) of bandwidth,
and the x1 PCI Express slot offering 250 MB/sec.
Warning:
If a performance graphics card was installed to 16x PCI Ex-
press slot, 2x12 pin power supply was strongly recommended,
since that card maybe drawn 75W power.
30
Chapter 2
PCI Express x1 slots
915M03 Series User Manual
Installation Instructions
PCI Express x16 slot