TYAN TOMCAT I7221A User Manual page 45

Tomcat i7221A S5151
Express transmission and reception data rate is 2.5 Gbits/sec. A serial interconnect between
two devices results in fewer pins per device package, which reduces PCI Express chip and
board design cost and reduces board design complexity. PCI Express performance is also
highly scalable. This is achieved by implementing scalable numbers for pins and signal lanes
per interconnect based on communication performance requirements for that interconnect.
However, PCI Express is software backwards compatible with existing PCI systems. In fact, a
PCI Express system will boot an existing OS with no changes to current drivers and
application programs. Even PCI/ACPI power management software will still run.
PCI Express Slots 1-2
When enabled, the BIOS checks these ports to detect and activate the PCI devices connected
to them.
When set to Auto, the BIOS auto determines whether to enable or disable them, depending on
whether PCI devices have been connected.
Auto / Enabled / Disabled
NOTE : If user disables PCI Express Slot 1 in Setup menu, all ICH6 PCI Express ports will be
disabled too (including Broadcom LAN).
PCI-E Compliance Mode
This BIOS option determines compatibility between PCI-Express specific ation v1.0 and PCI-
Express specification v1.0a.
V1.0a / V1.0
3-15
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Chapter 3: BIOS Setup