Lenovo ThinkSystem HR350A - Page 54

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WARNING: Enabling ASPM might cause some PCI-E devices to fail!
PCI Express Link Register Settings
ASPM Support
Set the ASPM Level:
- Force L0s - Force all links to L0s State
- AUTO - BIOS auto configure
- DISABLE - 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 ranges from 10 to 10000 uS.
Unpopulated Links
In order to save power, software will disable unpopulated PCI Express links, if this
option set to Disable. The options are Keep Link ON and Disalbel Link.
Setting
Description
PCI Express Device Register Settings
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.
The available options are Auto, 128 Bytes, 256 Bytes, 512Bytes, 1024 Bytes,
2048 Bytes, and 4096 Bytes.
Maximum Read Request
Set Maximum Read Request Size of PCI Express Device or allow System BIOS to
select the value.
The available options are Auto, 128 Bytes, 256 Bytes, 512 Bytes, 1024 Bytes,
2048 Bytes, and 4096 Bytes.
PCI Express Link Register Settings
ASPM Support
Set the ASPM Level:
- Force L0s - Force all links to L0s State
- AUTO - BIOS auto configure
- DISABLE - Disables ASPM
Extended Synch Link Training Retry
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 10000 uS.
Unpopulated Links
In order to save power, software will disable unpopulated PCI
Express links, if this option set to Disable.