Chapter 4: AMI BIOS
4-9
Hysteresis Temperature (Closed Loop Only)
Temperature Hysteresis is the temperature lag (in degrees Celsius) after the
set DIMM temperature threshold is reached before Closed Loop Throttling
begins. The options are Disabled,
1.5oC
, 3.0
o
C, and 6.0
o
C.
Guardband Temperature (Closed Loop Only)
This is the temperature which applies to the DIMM temperature threshold.
Each step is in 0.5
o
C increment. The default is
[006]
. Press "+" or "-" on
your keyboard to change this value.
Inlet Temperature
This is the temperature detected at the chassis inlet. Each step is in 0.5
o
C
increment. The default is
[070]
.
Temperature Rise
This is the temperature rise to the DIMM thermal zone. Each step is in 0.5
o
C
increment. The default is
[020]
.
Air Flow
This is the air fl ow speed to the DIMM modules. Each step is one mm/sec.
The default is
[1500]
.
Altitude
This feature defi nes how many meters above or below sea level the system
is located. The options are
Sea Level or Below,
1~300, 301~600, 601~900,
901~1200, 1201~1500, 1501~1800, 1801~2100, 2101~2400, 2401~2700,
2701~3000.
DIMM Pitch
This is the physical space between each DIMM module. Each step is in
1/1000 of an inch. The default is
[400]
.
North Bridge Confi guration
This feature allows the user to confi gure Intel IOH settings.
Crystal Beach/DMA (Direct Memory Access)
This feature works in conjunction with the Intel I/O AT (Acceleration Technology)
to accelerate the performance of TOE devices. (
Note
: A TOE device is a special-
ized, dedicated processor that is installed on an add-on card or a network card to
handle some or all packet processing of this add-on card.) When this feature is set
to Enabled, it will enhance overall system performance by providing direct memory
access for data transferring. The options are Enabled and
Disabled.
