SUPER MICRO Computer X8STI-F - Manual (Page 79)

Chapter 4: AMI BIOS
4-9
DCA Prefetch Delay
A DCA Prefetch is used with TOE components to prefetch data in order to shorten execution
cycles and maximize data processing efficiency. Prefetching too frequently can saturate the
cache directory and delay necessary cache accesses. This feature reduces or increases the
frequency the system prefetches data. The options are [8], [16], [24],
[32], [40], [48], [56],
[64], [72], [80], [88], [96], [104], [112], [120]

Advanced Chipset Control
The items included in the Advanced Settings submenu are listed below.

QPI and IMC Configuration
QuickPath Interconnect (QPI) is the connection between the CPU and the motherboard's
I/O hub. Use this feature to modify speed and power management settings.
QPI Links Speed
Use this feature to select QPI data transfer speed. The options are Slow-
mode, and
Full Speed.
QPI Frequency
Use this option to set the QPI frequency. The options are
Auto, 4.800 GT,
5.866 GT, and 6.400 GT.
QPI L0s and L1
QuickPath Interconnect (QPI) offers three power states called L0, L0s and
L1:
L0 is a normal operational state where data and control packets can be
transmitted and received. All power management states are entered from
this state.
L0s is intended as a power saving state. It allows a link to quickly enter and
recover form a power saving state without going through recovery.
L1 is a power saving state that allows an additional power saving over L0s,
but with additional resume (wake-up) latency.
Select Enabled to activate QPI power saving (L0s and L1 are automatically
selected by the motherboard), select Disabled for normal operational state
without any power-saving function. The options are Disabled and
Enabled.
Memory Frequency
Use this option to force the system memory to run at a different frequency
than the default frequency. The available options are
Auto, Force DDR-800,
Force DDR-1066, and Force DDR-1333.