User manual

2U Rack Series User Manual
61
PCI Express Settings
SETTIN
DESCRIPTION
Relaxed Ordering
Enables or Disables PCI Express Device Relaxed Ordering
Extended Tag
If Enabled allows device to use 8-bit tag field as a requester
No Snoop
Enables or Disables PCI Express Device No Snoop option
Maximum Payload
Set maximum payload of PCI express device or allow system
BIOS to select the value(128~4096 bytes)
Maximum Read
Request
Set maximum Read Request size of PCI express device or
allow system BIOS to select the value(128~4096 bytes)
ASPM Support
Set the ASPM Level: Force L0S-Force all links to L0s State:
Auto- BIOS auto configure: Disabled- disables ASPM
Extended Synch
If Enabled allows generation of extended Synchronization
patterns
Link Training Retry
Defines number of retry attempts software will take to
retrain the link if previous training attempt was
unsuccessful
Link Training Timeout
Defines number of microseconds software will wait before
polling ‘Link Training” bit in link status register. Value range
from 10 to 1000 uS
Unpopulated Links
In order to save power, software will disable unpopulated